A word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other.

synonyms: antonym, opposite word.

Roget 237: contraposition^†, opposition; polarity; inversion etc. 218; opposite side; reverse, inverse; counterpart; antipodes; opposite poles, North and South.    antonym, opposite (contrariety) 14.    ... show more

Dutch: tegendeel, tegengestelde, tegenovergestelde, antoniem
Polish: antonim

A relation of direct opposition.

synonyms: contrary, reverse.

Dutch: omgekeerde, tegendeel, tegenovergestelde, tegengestelde, antipode, pool, tegenpool, tegenvoeter
Polish: odwrotność, przeciwieństwo

A contestant that you are matched against.

synonyms: opponent, opposition.

Dutch: opponent, verzet, tegenstand, tegenwerking, tegenpartij, oppositie, oppositiepartij

Something inverted in sequence or character or effect.

synonym: inverse.

Dutch: tegenovergesteld, omgekeerd

Being directly across from each other; facing.

Roget 237: opposite; reverse, inverse; converse, antipodal, subcontrary^†; fronting, facing, diametrically opposite.    Northern, septentrional, Boreal, arctic; Southern, Austral, antarctic.    ... show more

Roget 218: inverted etc. v.; wrong side out, wrong side up; inside out, upside down; bottom upwards, keel upwards; supine, on one's head, topsy-turvy, sens dessus dessous [Fr.].    inverse; reverse etc. (contrary) 14; opposite etc. 237.    top heavy.    ... show more

Roget 14: contrary, contrarious^†, contrariant^†; opposite, counter, dead against; converse, reverse; opposed, antithetical, contrasted, antipodean, antagonistic, opposing; conflicting, inconsistent, contradictory, at cross purposes; negative; hostile etc. 703.    differing toto coelo [Lat.]; diametrically opposite; diametrically opposed; as opposite as black and white, as opposite as light and darkness, as opposite as fire and water, as opposite as the poles; as different as night and day; Hyperion to a satyr" [Hamlet]; quite the contrary, quite the reverse; no such thing, just the other way, tout au contraire [Fr.].    ... show more

Of leaves etc; growing in pairs on either side of a stem:
— Opposite leaves.

synonym: paired.

Moving or facing away from each other.

The other one of a complementary pair.

Altogether different in nature or quality or significance.

Polish: odwrotny

Characterized by opposite extremes; completely opposed:
— Diametrical (or opposite) points of view.
— Opposite meanings.

synonyms: diametric, diametrical, polar.

Directly facing each other:
— They sat opposite at the table.

synonyms: face-to-face, face to face.