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4 : diametrically different

5 : being the other of a matching or contrasting pair

— op·po·site·ly adverb

— op·po·site·ness noun

Synonyms

antipodal, antithetical, contradictory, contrary, diametric, polar; also adverse, negative, unfavorable; antagonistic, antipathetic, counter, hostile; converse, inverse, reverse; disparate, dissimilar, divergent, unalike, unlike

2opposite noun : one that is opposed or contrary

Synonyms

antipode, antithesis, contrary, negative, reverse; also negation; antonym; converse, inverse

3opposite adverb : on or to an opposite side

4opposite preposition : across from and usu. facing

op·press verb 1 : to crush by abuse of power or authority

2 : to be a burden to mentally or spiritually

Synonyms

burden, depress, sadden—more at DEPRESS

carry away, crush, devastate, floor, overcome, overpower, overwhelm, prostrate, snow under, swamp—more at OVERWHELM

op·pres·sion noun 1 : unjust or cruel exercise of power or authority

2 : a sense of being affected as if with a heavy weight in body or mind : DEPRESSION

op·pres·sive adjective : unreasonably burdensome or severe

Synonyms

burdensome, grim, hard, harsh, heavy, onerous, rough, rugged, severe, stiff, tough, trying—more at HARSH

op·pres·sive·ly adverb : in an oppressive manner

Synonyms

hard, hardly, harshly, ill, roughly, severely, sternly, stiffly—more at HARDLY

op·pres·sor noun : one that oppresses esp. when in a position of public authority

Synonyms

autocrat, despot, dictator, tyrant—more at DESPOT

op·pro·bri·ous adjective : expressing or deserving opprobrium

— op·pro·bri·ous·ly adverb

op·pro·bri·um noun 1 : something that brings disgrace

2 : public disgrace or ill fame that follows from conduct considered grossly wrong or vicious : INFAMY

Synonyms

discredit, disgrace, dishonor, disrepute, ignominy, infamy, odium, reproach, shame—more at DISGRACE

1opt verb 1 : to make a choice

2 : to decide in favor of something — usu. used with for

Synonyms

[1] choose, conclude, decide, determine, figure, resolve—more at DECIDE

usually opt for [2] choose, cull, elect, handpick, name, pick, prefer, select, single, take—more at CHOOSE

2opt abbreviation 1 optical; optician; optics

2 option; optional

op·tic adjective : of or relating to vision or the eye

op·ti·cal adjective 1 : relating to optics

2 : of or relating to vision : OPTIC

3 : of, relating to, or using light

Synonyms

ocular, optic, visual—more at VISUAL

optical art noun : nonobjective art characterized by the use of geometric patterns often for an illusory effect

optical disk noun : a disk on which information has been recorded digitally and which is read using a laser

optical fiber noun : a single fiber-optic strand

op·ti·cian noun 1 : a maker of or dealer in optical items and instruments

2 : a person who makes or orders eyeglass and contact lenses to prescription and sells glasses

op·tics noun plural : a science that deals with the nature and properties of light

op·ti·mal adjective : most desirable or satisfactory

— op·ti·mal·ly adverb

op·ti·mism noun [ORIGIN: F optimisme, fr. L optimum, n., best, fr. neut. of optimus best]

1 : a doctrine that this world is the best possible world

2 : an inclination to anticipate the best possible outcome of actions

— op·ti·mist noun

— op·ti·mis·tic adjective

op·ti·mize verb -mized; -miz·ing : to make as perfect, effective, or functional as possible

— op·ti·mi·za·tion noun

op·ti·mum noun, plural -ma also -mums [ORIGIN: L]

: the amount or degree of something most favorable to an end; also : greatest degree attained under implied or specified conditions

op·tion noun 1 : the power or right to choose

2 : a right to buy or sell something at a specified price during a specified period

3 : something offered for choice

4 : an act of choosing

Synonyms

[1] accord, choice, free will, self-determination, volition, will—more at FREE WILL

[4] alternative, choice, discretion, pick, preference,