Webster's Dictionary, 1913

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Opplete, Oppleted adjective [ Latin oppletus , past participle of opplere to fill up; ob (see Ob- ) + plere to fill.] Filled; crowded. [ Obsolete] Johnson.

Oppletion noun The act of filling up, or the state of being filled up; fullness. [ Obsolete]

Oppone transitive verb [ Latin opponere . See Opponent .] To oppose. [ Obsolete] B. Jonson.

Opponency noun The act of opening an academical disputation; the proposition of objections to a tenet, as an exercise for a degree. [ Eng.] Todd.

Opponent adjective [ Latin opponens , -entis , present participle of opponere to set or place against, to oppose; ob (see Ob- ) + ponere to place. See Position .] Situated in front; opposite; hence, opposing; adverse; antagonistic. Pope.

Opponent noun
1. One who opposes; an adversary; an antagonist; a foe. Macaulay.

2. One who opposes in a disputation, argument, or other verbal controversy; specifically, one who attacks some theirs or proposition, in distinction from the respondent , or defendant , who maintains it.

How becomingly does Philopolis exercise his office, and seasonably commit the opponent with the respondent, like a long-practiced moderator!
Dr. H. More.

Syn. -- Antagonist; opposer; foe. See Adversary .

Opportune adjective [ French opporiun , Latin opportunus , lit., at or before the port; ob (see Ob- ) + a derivative of portus port, harbor. See Port harbor.] Convenient; ready; hence, seasonable; timely. Milton.

This is most opportune to our need.

-- Op`por*tune"ly , adverb -- Op`por*tune"ness , noun

Opportune transitive verb To suit. [ Obsolete] Dr. Clerke(1637).

Opportunism noun [ Confer French opportunisme .] The art or practice of taking advantage of opportunities or circumstances, or of seeking immediate advantage with little regard for ultimate consequences. [ Recent]

Opportunist noun [ Confer French opportuniste .] One who advocates or practices opportunism. [ Recent]

Opportunity noun ; plural Opportunities . [ French opportunité , Latin opportunitas . See Opportune .]
1. Fit or convenient time; a time or place favorable for executing a purpose; a suitable combination of conditions; suitable occasion; chance.

A wise man will make more opportunities than he finds.

2. Convenience of situation; fitness. [ Obsolete]

Hull, a town of great strength and opportunity , both to sea and land affairs.

3. Importunity; earnestness. [ Obsolete] Jer. Taylor.

Syn. -- Occasion; convenience; occurrence. -- Opportunity , Occasion . An occasion is that which falls in our way, or presents itself in the course of events; an opportunity is a convenience or fitness of time, place, etc., for the doing of a thing. Hence, occasions often make opportunities . The occasion of sickness may give opportunity for reflection.

Opposability noun The condition or quality of being opposable.

In no savage have I ever seen the slightest approach to opposability of the great toe, which is the essential distinguishing feature of apes.
A. R. Wallace.

Opposable adjective
1. Capable of being opposed or resisted.

2. Capable of being placed opposite something else; as, the thumb is opposable to the forefinger.

Opposal noun Opposition. [ R.] Sir T. Herbert.

Oppose transitive verb [ imperfect & past participle Opposed ; present participle & verbal noun Opposing .] [ French opposer . See Ob- , Pose , and confer 2d Appose , Puzzle , noun Confer L. opponere , oppositum .]
1. To place in front of, or over against; to set opposite; to exhibit.

Her grace sat down . . .
In a rich chair of state; opposing freely
The beauty of her person to the people.

2. To put in opposition, with a view to counterbalance or countervail; to set against; to offer antagonistically.

I may . . . oppose my single opinion to his.

3. To resist or antagonize by physical means, or by arguments, etc.; to contend against; to confront; to resist; to withstand; as, to oppose the king in battle; to oppose a bill in Congress.

4. To compete with; to strive against; as, to oppose a rival for a prize.

I am . . . too weak
To oppose your cunning.

Syn. -- To combat; withstand; contradict; deny; gainsay; oppugn; contravene; check; obstruct.

Oppose intransitive verb
1. To be set opposite. Shak.

2. To act adversely or in opposition; -- with against or to ; as, a servant opposed against the act. [ Obsolete] Shak.

3. To make objection or opposition in controversy.

Opposeless adjective Not to be effectually opposed; irresistible. [ Obsolete] "Your great opposeless wills." Shak.

Opposer noun One who opposes; an opponent; an antagonist; an adversary.

Opposite adjective [ French, from Latin oppositus , past participle of opponere . See Opponent .]
1. Placed over against; standing or situated over against or in front; facing; -- often with to ; as, a house opposite to the Exchange.

2. Applied to the other of two things which are entirely different; other; as, the opposite sex; the opposite extreme.

3. Extremely different; inconsistent; contrary; repugnant; antagonistic.

Novels, by which the reader is misled into another sort of pieasure opposite to that which is designed in an epic poem.

Particles of speech have divers, and sometimes almost opposite , significations.

4. (Botany) (a) Set over against each other, but separated by the whole diameter of the stem, as two leaves at the same node. (b) Placed directly in front of another part or organ, as a stamen which stands before a petal.

Opposite noun
1. One who opposes; an opponent; an antagonist. [ Obsolete]

The opposites of this day's strife.

2. That which is opposed or contrary; as, sweetness and its opposite .

The virtuous man meets with more opposites and opponents than any other.

Oppositely adverb In a situation to face each other; in an opposite manner or direction; adversely.

Winds from all quarters oppositely blow.

Oppositeness noun The quality or state of being opposite.

Oppositifolious adjective [ See Opposite , Folious .] (Botany) Placed at the same node with a leaf, but separated from it by the whole diameter of the stem; as, an oppositifolious peduncle.

Opposition noun [ French, from Latin oppositio . See Opposite .]
1. The act of opposing; an attempt to check, restrain, or defeat; resistance.

The counterpoise of so great an opposition .

Virtue which breaks through all opposition .

2. The state of being placed over against; situation so as to front something else. Milton.

3. Repugnance; contrariety of sentiment, interest, or purpose; antipathy. Shak.

4. That which opposes; an obstacle; specifically, the aggregate of persons or things opposing; hence, in politics and parliamentary practice, the party opposed to the party in power.

5. (Astron.) The situation of a heavenly body with respect to another when in the part of the heavens directly opposite to it; especially, the position of a planet or satellite when its longitude differs from that of the sun 180°; - - signified by the symbol ...; as, ... &Jupiter; &Sun;, opposition of Jupiter to the sun.

6. (Logic) The relation between two propositions when, having the same subject and predicate, they differ in quantity, or in quality, or in both; or between two propositions which have the same matter but a different form.

Oppositionist noun One who belongs to the opposition party. Praed.

Oppositipetalous adjective [ See Opposite , and Petal .] (Botany) Placed in front of a petal.

Oppositisepalous adjective [ See Opposite , and Sepal .] (Botany) Placed in front of a sepal.

Oppositive adjective [ Confer French oppositif . See Opposite .] Capable of being put in opposition. Bp. Hall.

Oppress transitive verb [ imperfect & past participle Oppressed ; present participle & verbal noun Oppressing .] [ French oppresser , Late Latin oppressare , from Latin oppressus , past participle of opprimere ; ob (see Ob- ) + premere to press. See Press .]
1. To impose excessive burdens upon; to overload; hence, to treat with unjust rigor or with cruelty. Wyclif.

For thee, oppressèd king, am I cast down.

Behold the kings of the earth; how they oppress
Thy chosen !

2. To ravish; to violate. [ Obsolete] Chaucer.

3. To put down; to crush out; to suppress. [ Obsolete]

The mutiny he there hastes to oppress .

4. To produce a sensation of weight in (some part of the body); as, my lungs are oppressed by the damp air; excess of food oppresses the stomach.

Oppression noun [ French, from Latin oppressio .]

1. The act of oppressing, or state of being oppressed.

2. That which oppresses; a hardship or injustice; cruelty; severity; tyranny. "The multitude of oppressions ." Job xxxv. 9.

3. A sense of heaviness or obstruction in the body or mind; depression; dullness; lassitude; as, an oppression of spirits; an oppression of the lungs.

There gentlee Sleep
First found me, and with soft oppression seized
My drowsed sense.

4. Ravishment; rape. [ Obsolete] Chaucer.

Oppressive adjective [ Confer French oppressif .]

1. Unreasonably burdensome; unjustly severe, rigorous, or harsh; as, oppressive taxes; oppressive exactions of service; an oppressive game law. Macaulay.

2. Using oppression; tyrannical; as, oppressive authority or commands.

3. Heavy; overpowering; hard to be borne; as, oppressive grief or woe.

To ease the soul of one oppressive weight.

-- Op*press"ive*ly , adverb -- Op*press"ive*ness , noun

Oppressor noun [ Latin ] One who oppresses; one who imposes unjust burdens on others; one who harasses others with unjust laws or unreasonable severity.

The orphan pines while the oppressor feeds.

To relieve the oppressed and to punish the oppressor .

Oppressure noun Oppression. [ Obsolete]

Opprobrious adjective [ Latin opprobriosus , from opprobrium . See Opprobrium .]
1. Expressive of opprobrium; attaching disgrace; reproachful; scurrilous; as, opprobrious language.

They . . . vindicate themselves in terms no less opprobrious than those by which they are attacked.

2. Infamous; despised; rendered hateful; as, an opprobrious name.

This dark, opprobrious den of shame.

-- Op*pro"bri*ous*ly , adverb -- Op*pro"bri*ous*ness , noun

Opprobrium noun [ Latin , from ob (see Ob- ) + probrum reproach, disgrace.] Disgrace; infamy; reproach mingled with contempt; abusive language.

Being both dramatic author and dramatic performer, he found himself heir to a twofold opprobrium .
De Quincey.

Opprobry noun Opprobrium. [ Obsolete] Johnson.

Oppugn transitive verb [ imperfect & past participle Oppugned ; p pr. & verbal noun Oppugning .] [ Old French oppugner , Latin oppugnare ; ob (see Ob- ) + pugnare to fight. See Impugn .] To fight against; to attack; to be in conflict with; to oppose; to resist.

They said the manner of their impeachment they could not but conceive did oppugn the rights of Parliament.

Oppugnancy noun [ See Oppugnant .] The act of oppugning; opposition; resistance. Shak.

Oppugnant adjective [ Latin oppugnans , present participle of oppugnare . See Oppugn .] Tending to awaken hostility; hostile; opposing; warring. " Oppugnant forces." I. Taylor. -- noun An opponent. [ R.] Coleridge.

Oppugnation noun [ Latin oppugnatio : confer Old French oppugnation .] Opposition. [ R.] Bp. Hall.

Oppugner noun One who opposes or attacks; that which opposes. Selden.

Opsimathy noun [ Greek ....] Education late in life. [ R.] Hales.

Opsiometer noun [ Greek ... sight + -meter : confer French opsiomètre .] An instrument for measuring the limits of distincts vision in different individuals, and thus determiming the proper focal length of a lens for correcting imperfect sight. Brande & C.

Opsonation noun [ Latin opsonatio .] A catering; a buying of provisions. [ Obsolete] Bailey.

Optable adjective [ Latin optabilis .] That may be chosen; desirable. [ Obsolete] Cockeram.

Optate intransitive verb [ Latin optatus , past participle of optare .] To choose; to wish for; to desire. [ Obsolete] Cotgrave.

Optation noun [ Latin optatio . See Option .] The act of optating; a wish. [ Obsolete] Sir T. Browne.

Optative adjective [ Latin optativus : confer French optatif .] Expressing desire or wish. Fuller.

Optative mood (Gram.) , that mood or form of a verb, as in Greek, Sanskrit, etc., in which a wish or desire is expressed.

Optative noun [ Confer French optatif .]

1. Something to be desired. [ R.] Bacon.

2. (Gram.) The optative mood; also, a verb in the optative mood.

Optatively adverb In an optative manner; with the expression of desire. [ R.]

God blesseth man imperatively, and man blesseth God optatively .
Bp. Hall.