Webster's Dictionary, 1913

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Permanent adjective [ Latin permanens , -entis , present participle of permanere to stay or remain to the end, to last; per + manere to remain: confer French permanent . See Per- , and Mansion .] Continuing in the same state, or without any change that destroys form or character; remaining unaltered or unremoved; abiding; durable; fixed; stable; lasting; as, a permanent impression.

Eternity stands permanent and fixed.
Dryden.

Permanent gases (Chem. & Physics) , hydrogen, oxygen, nitrogen, and carbon monoxide; -- also called incondensible or incoercible gases , before their liquefaction in 1877. -- Permanent way , the roadbed and superstructure of a finished railway; -- so called in distinction from the contractor's temporary way . -- Permanent white (Chemistry) , barium sulphate ( heavy spar ), used as a white pigment or paint, in distinction from white lead , which tarnishes and darkens from the formation of the sulphide.

Syn. -- Lasting; durable; constant. See Lasting .

Permanently adverb In a permanent manner.

Permanganate noun (Chemistry) A salt of permanganic acid.

Potassium permanganate . (Chemistry) See Potassium permanganate , under Potassium .

Permanganic adjective (Chemistry) Pertaining to, or designating, one of the higher acids of manganese, HMnO 4 , which forms salts called permanganates .

Permansion noun [ Latin permansio . See Permanent .] Continuance. [ Obsolete] Sir T. Browne.

Permeability noun [ Confer French perméabilité .] The quality or state of being permeable.

Magnetic permeability (Physics) , the specific capacity of a body for magnetic induction, or its conducting power for lines of magnetic force. Sir W. Thomson.

Permeable adjective [ Latin permeabilis : confer French perméable . See Permeate .] Capable of being permeated, or passed through; yielding passage; passable; penetrable; -- used especially of substances which allow the passage of fluids; as, wood is permeable to oil; glass is permeable to light. I. Taylor.

Permeably adverb In a permeable manner.

Permeance noun [ See Permeant .] Permeation; specif. (Magnetism) , the reciprocal of reluctance.

Permeant adjective [ Latin permeans , present participle] Passing through; permeating. [ R.] Sir T. Browne.

Permeate transitive verb [ imperfect & past participle Permeated ; present participle & verbal noun Permeating .] [ Latin permeatus , past participle of permeare to permeate; per + meare to go, pass.]
1. To pass through the pores or interstices of; to penetrate and pass through without causing rupture or displacement; -- applied especially to fluids which pass through substances of loose texture; as, water permeates sand. Woodward.

2. To enter and spread through; to pervade.

God was conceived to be diffused throughout the whole world, to permeate and pervade all things.
Cudworth.

Permeation noun The act of permeating, passing through, or spreading throughout, the pores or interstices of any substance.

Here is not a mere involution only, but a spiritual permeation and inexistence.
Bp. Hall.

Permian adjective [ From the ancient kingdom of Permia , where the Permian formation exists.] (Geol.) Belonging or relating to the period, and also to the formation, next following the Carboniferous, and regarded as closing the Carboniferous age and Paleozoic era. -- noun The Permian period. See Chart of Geology .

Permians noun plural ; sing. Permian (Ethnol.) A tribe belonging to the Finnic race, and inhabiting a portion of Russia.

Permiscible adjective [ Latin permiscere to mingle; per + miscere to mix.] Capable of being mixed.

Permiss noun [ See Permit .] A permitted choice; a rhetorical figure in which a thing is committed to the decision of one's opponent. [ Obsolete] Milton.

Permissibility noun The quality of being permissible; permissibleness; allowableness.

Permissible adjective That may be permitted; allowable; admissible. -- Per*mis"si*ble*ness , noun -- Per*mis"si*bly , adverb

Permission noun [ Latin permissio : confer French permission . See Permit .] The act of permitting or allowing; formal consent; authorization; leave; license or liberty granted.

High permission of all-ruling Heaven.
Milton.

You have given me your permission for this address.
Dryden.

Syn. -- Leave; liberty; license. -- Leave , Permission . Leave implies that the recipient may decide whether to use the license granted or not. Permission is the absence on the part of another of anything preventive, and in general, at least by implication, signifies approval.

Permissive adjective
1. Permitting; granting leave or liberty. "By his permissive will." Milton.

2. Permitted; tolerated; suffered. Milton.

Permissively adverb In a permissive manner.

Permistion noun [ Latin permistio , permixtio , from permiscere , permistum , and permixtum . See Permiscible .] The act of mixing; the state of being mingled; mixture. [ Written also permixtion .]

Permit transitive verb [ imperfect & past participle Permitted ; present participle & verbal noun Permitting .] [ Latin permittere , permissum , to let through, to allow, permit; per + mittere to let go, send. See Per- , and Mission .]
1. To consent to; to allow or suffer to be done; to tolerate; to put up with.

What things God doth neither command nor forbid . . . he permitteth with approbation either to be done or left undone.
Hooker.

2. To grant (one) express license or liberty to do an act; to authorize; to give leave; -- followed by an infinitive.

Thou art permitted to speak for thyself.
Acis xxvi. 1.

3. To give over; to resign; to leave; to commit.

Let us not aggravate our sorrows,
But to the gods permit the event of things.
Addison.

Syn. -- To allow; let; grant; admit; suffer; tolerate; endure; consent to. -- To Allow , Permit , Suffer , Tolerate . To allow is more positive, denoting (at least originally and etymologically) a decided assent, either directly or by implication. To permit is more negative, and imports only acquiescence or an abstinence from prevention. The distinction, however, is often disregarded by good writers. To suffer has a stronger passive or negative sense than to permit , sometimes implying against the will, sometimes mere indifference. To tolerate is to endure what is contrary to will or desire. To suffer and to tolerate are sometimes used without discrimination.

Permit intransitive verb To grant permission; to allow.

Permit noun Warrant; license; leave; permission; specifically, a written license or permission given to a person or persons having authority; as, a permit to land goods subject to duty.

Permit noun [ Confer Spanish palamida a kind of scombroid fish.] (a) A large pompano ( Trachinotus goodei ) of the West Indies, Florida, etc. It becomes about three feet long. (b) The round pompano. ( T. falcatus ). [ Local, U. S.]

Permittance noun The act of permitting; allowance; permission; leave. Milton.

Permittee noun One to whom a permission or permit is given.

Permitter noun One who permits.

A permitter , or not a hinderer, of sin.
J. Edwards.

Permix transitive verb To mix; to mingle. [ Obsolete]

Permixtion noun See Permission .

Permulator noun (Electricity) A special form of rotary converter with stationary commutator and rotating brushes, in which the exciting field is induced by the alternating current in a short-circuited magnetic core instead of being produced by an external magnet.

Permutable adjective [ Confer French permutable .] Capable of being permuted; exchangeable. -- Per*mut"a*ble*ness , noun -- Per*mut"a*bly , adverb

Permutation noun [ Latin permutatio : confer French permutation . See Permute .]
1. The act of permuting; exchange of the thing for another; mutual transference; interchange.

The violent convulsions and permutations that have been made in property.
Burke.

2. (Math.) (a) The arrangement of any determinate number of things, as units, objects, letters, etc., in all possible orders, one after the other; -- called also alternation . Confer Combination , noun , 4. (b) Any one of such possible arrangements.

3. (Law) Barter; exchange.

Permutation lock , a lock in which the parts can be transposed or shifted, so as to require different arrangements of the tumblers on different occasions of unlocking.

Permute transitive verb [ Latin permutare , permutatum ; per + mutare to change: confer French permuter .]
1. To interchange; to transfer reciprocally.

2. To exchange; to barter; to traffic. [ Obsolete]

Bought, trucked, permuted , or given.
Hakluyt.

Permuter noun One who permutes.

Pern transitive verb [ See Pernancy .] To take profit of; to make profitable. [ Obsolete] Sylvester.

Pern noun (Zoology) The honey buzzard.

Pernancy noun [ Old French prenance , from prendre , prenre , penre , to take, Latin prendere , prehendere .] (Law) A taking or reception, as the receiving of rents or tithes in kind, the receiving of profits. Blackstone.

Pernel noun See Pimpernel . [ Obsolete]

Pernicion noun [ See 2d Pernicious .] Destruction; perdition. [ Obsolete] hudibras.

Pernicious adjective [ Latin pernix , -icis .] Quick; swift (to burn). [ R.] Milton.

Pernicity noun [ Latin pernicitas . See 1st Pernicious .] Swiftness; celerity. [ R.] Ray.

Pernickety Pernicketty adjective Finical or fussy; full of petty details. [ Colloq.]

Pernio noun [ Latin ] (Medicine) A chilblain.

Pernoctalian noun One who watches or keeps awake all night.

Pernoctation noun [ Latin pernoctatio , from pernoctare to stay all night; per + nox , noctis , night.] The act or state of passing the whole night; a remaining all night. " Pernoctation in prayer." Jer. Taylor.

Pernor noun [ See Pern , v. ] (Law) One who receives the profits, as of an estate.

Pernot furnace [ So called from Charles Pernot , its inventor.] A reverberatory furnace with a circular revolving hearth, -- used in making steel.