Webster's Dictionary, 1913

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Austromancy noun [ Latin auster south wind + -mancy .] Soothsaying, or prediction of events, from observation of the winds.

Auszug (ous"tsōk) noun ; German plural -zûge (-tsü`gẽ). [ G.] See Army organization , Switzerland .

Autœcious adjective [ Auto- + Greek ... house.] (Biol.) Passing through all its stages on one host, as certain parasitic fungi; -- contrasted with heterœcious .

Autœcism noun Quality of being autœcious.

Autarchy noun [ Greek ... independence; a'yto`s self + 'arkei^n to be sufficient.] Self- sufficiency. [ Obsolete] Milton.

Authentic adjective [ Middle English autentik , Old French autentique , French authentique , Latin authenticus coming from the real author, of original or firsthand authority, from Greek ..., from ... suicide, a perpetrator or real author of any act, an absolute master; a'yto`s self + a form "enths (not found), akin to Latin sons and perhaps orig. from the present participle of e'i^nai to be, root as , and meaning the one it really is . See Am , Sin , noun , and confer Effendi .]
1. Having a genuine original or authority, in opposition to that which is false, fictitious, counterfeit, or apocryphal; being what it purports to be; genuine; not of doubtful origin; real; as, an authentic paper or register.

To be avenged
On him who had stole Jove's authentic fire.
Milton.

2. Authoritative. [ Obsolete] Milton.

3. Of approved authority; true; trustworthy; credible; as, an authentic writer; an authentic portrait; authentic information.

4. (Law) Vested with all due formalities, and legally attested.

5. (Mus.) Having as immediate relation to the tonic, in distinction from plagal , which has a correspondent relation to the dominant in the octave below the tonic.

Syn. -- Authentic , Genuine . These words, as here compared, have reference to historical documents. We call a document genuine when it can be traced back ultimately to the author or authors from whom it professes to emanate. Hence, the word has the meaning, "not changed from the original, uncorrupted, unadulterated:" as, a genuine text. We call a document authentic when, on the ground of its being thus traced back, it may be relied on as true and authoritative (from the primary sense of "having an author, vouched for"); hence its extended signification, in general literature, of trustworthy, as resting on unquestionable authority or evidence; as, an authentic history; an authentic report of facts.

A genuine book is that which was written by the person whose name it bears, as the author of it. An authentic book is that which relates matters of fact as they really happened. A book may be genuine without being, authentic , and a book may be authentic without being genuine .
Bp. Watson.

It may be said, however, that some writers use authentic (as, an authentic document) in the sense of "produced by its professed author, not counterfeit."

Authentic noun An original (book or document). [ Obsolete] " Authentics and transcripts." Fuller.

Authentical adjective Authentic. [ Archaic]

Authentically adverb In an authentic manner; with the requisite or genuine authority.

Authenticalness noun The quality of being authentic; authenticity. [ R.] Barrow.

Authenticate transitive verb [ imperfect & past participle Authenticated ; present participle & verbal noun Authenticating ] [ Confer Late Latin authenticare .]
1. To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.

The king serves only as a notary to authenticate the choice of judges.
Burke.

2. To prove authentic; to determine as real and true; as, to authenticate a portrait. Walpole.

Authenticity noun [ Confer French authenticité .]
1. The quality of being authentic or of established authority for truth and correctness.

2. Genuineness; the quality of being genuine or not corrupted from the original.

» In later writers, especially those on the evidences of Christianity, authenticity is often restricted in its use to the first of the above meanings, and distinguished from qenuineness .

Authenticly adverb Authentically.

Authenticness noun The quality of being authentic; authenticity. [ R.] Hammond.

Authentics noun (Ciwil Law) A collection of the Novels or New Constitutions of Justinian, by an anonymous author; -- so called on account of its authenticity . Bouvier.

Author (a"thẽr) noun [ Middle English authour , autour , Old French autor , French auteur , from Latin auctor , sometimes, but erroneously, written autor or author , from augere to increase, to produce. See Auction , noun ]
1. The beginner, former, or first mover of anything; hence, the efficient cause of a thing; a creator; an originator.

Eternal King; thee, Author of all being.
Milton.

2. One who composes or writes a book; a composer, as distinguished from an editor, translator, or compiler.

The chief glory of every people arises from its authors .
Johnson.

3. The editor of a periodical. [ Obsolete]

4. An informant. [ Archaic] Chaucer.

Author (a"thẽr) transitive verb
1. To occasion; to originate. [ Obsolete]

Such an overthrow . . . I have authored .
Chapman.

2. To tell; to say; to declare. [ Obsolete]

More of him I dare not author .
Massinger.

Authoress noun A female author. Glover.

» The word is not very much used, author being commonly applied to a female writer as well as to a male.

Authorial adjective Of or pertaining to an author. "The authorial ...we.'" Hare.

Authorism (a"thẽr*ĭz'm) noun Authorship. [ R.]

Authoritative adjective
1. Having, or proceeding from, due authority; entitled to obedience, credit, or acceptance; determinate; commanding.

The sacred functions of authoritative teaching.
Barrow.

2. Having an air of authority; positive; dictatorial; peremptory; as, an authoritative tone.

The mock authoritative manner of the one, and the insipid mirth of the other.
Swift.

-- Au*thor"i*ta*tive*ly , adverb -- Au*thor"i*ta*tive*ness , noun

Authority noun ; plural Authorities [ Middle English autorite , auctorite , French autorité , from Latin auctoritas , from auctor . See Author , noun ]
1. Legal or rightful power; a right to command or to act; power exercised buy a person in virtue of his office or trust; dominion; jurisdiction; authorization; as, the authority of a prince over subjects, and of parents over children; the authority of a court.

Thus can the demigod, Authority ,
Make us pay down for our offense.
Shak.

By what authority doest thou these things ?
Matt. xxi. 23.

2. Government; the persons or the body exercising power or command; as, the local authorities of the States; the military authorities . [ Chiefly in the plural.]

3. The power derived from opinion, respect, or esteem; influence of character, office, or station, or mental or moral superiority, and the like; claim to be believed or obeyed; as, an historian of no authority ; a magistrate of great authority .

4. That which, or one who, is claimed or appealed to in support of opinions, actions, measures, etc. Hence: (a) Testimony; witness. "And on that high authority had believed." Milton. (b) A precedent; a decision of a court, an official declaration, or an opinion, saying, or statement worthy to be taken as a precedent. (c) A book containing such a statement or opinion, or the author of the book. (d) Justification; warrant.

Wilt thou be glass wherein it shall discern
Authority for sin, warrant for blame.
Shak.

Authorizable adjective [ Late Latin authorisabilis .] Capable of being authorized. Hammond.

Authorization noun [ Confer French autorisation .] The act of giving authority or legal power; establishment by authority; sanction or warrant.

The authorization of laws.
Motley.

A special authorization from the chief.
Merivale.

Authorize transitive verb [ imperfect & past participle Authorized ; present participle & verbal noun Authorizing .] [ Middle English autorize , French autoriser , from Late Latin auctorizare , authorisare . See Author .]
1. To clothe with authority, warrant, or legal power; to give a right to act; to empower; as, to authorize commissioners to settle a boundary.

2. To make legal; to give legal sanction to; to legalize; as, to authorize a marriage.

3. To establish by authority, as by usage or public opinion; to sanction; as, idioms authorized by usage.

4. To sanction or confirm by the authority of some one; to warrant; as, to authorize a report.

A woman's story at a winter's fire,
Authorized by her grandam.
Shak.

5. To justify; to furnish a ground for. Locke.

To authorize one's self , to rely for authority. [ Obsolete]

Authorizing himself , for the most part, upon other histories.
Sir P. Sidney.

Authorized adjective
1. Possessed of or endowed with authority; as, an authorized agent.

2. Sanctioned by authority.

The Authorized Version of the Bible is the English translation of the Bible published in 1611 under sanction of King James I. It was "appointed to be read in churches," and has been the accepted English Bible. The Revised Version was published in a complete form in 1855.

Authorizer noun One who authorizes.

Authorless adjective Without an author; without authority; anonymous.

Authorly adjective Authorial. [ R.] Cowper.

Authorship noun
1. The quality or state of being an author; function or dignity of an author.

2. Source; origin; origination; as, the authorship of a book or review, or of an act, or state of affairs.

Authotype noun A type or block containing a facsimile of an autograph. Knight.

Auto- [ Greek ... self.] A combining form, with the meaning of self , one's self , one's own , itself , its own .

Auto- An abbrev. of automobile , used as a prefix with the meaning of self-moving , self- propelling ; as, an auto car, an auto carriage, an auto truck, etc., an automobile car, carriage, truck, etc.

Autobiographer noun [ Auto- + biographer .] One who writers his own life or biography.

Autobiographic, Autobiographical adjective Pertaining to, or containing, autobiography; as, an autobiographical sketch. "Such traits of the autobiographic sort." Carlyle. -- Au`to*bi`o*graph"ic*al*ly , adverb

Autobiographist noun One who writes his own life; an autobiographer. [ R.]

Autobiography noun ; plural Autobiographies [ Auto- + biography .] A biography written by the subject of it; memoirs of one's life written by one's self.

Autocarpous, Autocarpian adjective [ Auto- + Greek karpo`s fruit.] (Botany) Consisting of the ripened pericarp with no other parts adnate to it, as a peach, a poppy capsule, or a grape.

Autocatalysis noun [ Auto- + catalysis .] (Chemistry) Self-catalysis; catalysis of a substance by one of its own products, as of silver oxide by the silver formed by reduction of a small portion of it. -- Au`to*cat`a*lyt"ic adjective

Autocephalous adjective [ Greek ... independent; ... self + ... head.] (Eccl. Hist.) Having its own head; independent of episcopal or patriarchal jurisdiction, as certain Greek churches.

Autochronograph noun [ Auto- + chronograph .] An instrument for the instantaneous self- recording or printing of time. Knight.

Autochthon noun ; plural English Authochthons Latin Autochthones [ Latin , from Greek ..., plural ..., from the land itself; a'yto`s self + ... earth, land.]
1. One who is supposed to rise or spring from the ground or the soil he inhabits; one of the original inhabitants or aborigines; a native; -- commonly in the plural. This title was assumed by the ancient Greeks, particularly the Athenians.

2. That which is original to a particular country, or which had there its origin.

Autochthonal, Authochthonic Au*toch"tho*nous adjective Aboriginal; indigenous; native.

Autochthonism noun The state of being autochthonal.

Autochthony noun An aboriginal or autochthonous condition.

Autoclastic adjective [ See Auto- ; Clastic .] (Geol.) Broken in place; -- said of rocks having a broken or brecciated structure due to crushing, in contrast to those of brecciated materials brought from a distance.

Autoclave noun [ French, from Greek a'yto`s self + Latin clavis key.] A kind of French stewpan with a steam-tight lid. Knight.

Autocoherer noun [ Auto- + coherer .] (Wireless Teleg.) A self-restoring coherer, as a microphonic detector.

Autocracy noun ; plural Autocracies . [ Greek ...: confer French autocratie . See Autocrat .]
1. Independent or self-derived power; absolute or controlling authority; supremacy.

The divine will moves, not by the external impulse or inclination of objects, but determines itself by an absolute autocracy .
South.

2. Supreme, uncontrolled, unlimited authority, or right of governing in a single person, as of an autocrat.

3. Political independence or absolute sovereignty (of a state); autonomy. Barlow.

4. (Medicine) The action of the vital principle, or of the instinctive powers, toward the preservation of the individual; also, the vital principle. [ In this sense, written also autocrasy .] Dunglison.

Autocrat noun [ Greek ...; ... self + ... strength, ... strong: confer French autocrate . See Hard , adjective ]
1. An absolute sovereign; a monarch who holds and exercises the powers of government by claim of absolute right, not subject to restriction; as, Autocrat of all the Russias (a title of the Czar).

2. One who rules with undisputed sway in any company or relation; a despot.

The autocrat of the breakfast table.
Holmes.