Meaning

noun the action of opposing something that you disapprove or disagree with

noun the relation between opposed entities

noun the act of hostile groups opposing each other

originFrom Middle English opposicioun, from Old French oposicion (whence French opposition), from Late Latin oppositiō, translating Ancient Greek ἀντίθεσις (antíthesis), from the past participle stem of classical Latin oppōnō (“to set against”). Equivalent to oppose + -ition.

Etymology from Wiktionary, CC BY-SA 3.0