What does against mean?
"Against" is one of the most versatile prepositions in English, expressing several closely related ideas. Its core sense is opposition: to act, fight, vote, or compete against someone or something is to be in conflict or disagreement with it. A second major sense is physical contact — leaning a picture against a wall, pressing a hand against a door, or holding an umbrella against the rain, where the preposition describes touching, supporting, or shielding. It can also express contrast or measurement, as in judging results against expectations or setting events against a wider background. Derived from the same Old English root as "again", the two words diverged over centuries until they meant entirely different things. Today "against" appears constantly in everyday speech, sport, law, and politics, and idioms such as "against all odds" and "against the grain" give it a rich expressive range that makes it indispensable to clear, forceful writing.
Expressing opposition, conflict, or resistance; physical contact or support; protection from something; or contrast with a standard or expectation.
"The new measures were introduced against strong public opposition."
Almost always followed directly by a noun, pronoun, or noun phrase as its object.
(Archaic or dialectal) In the direction opposite to something; facing towards it.
"The ship sailed against the wind."
This adverbial use survives mainly in older texts and regional speech; modern English treats such constructions as prepositional.
"Against" and "again" were once the very same Old English word — "ongeagn" — before centuries of use split them into two completely different meanings.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of against
"Against" descends from the Old English preposition "ongeagn" (later "onȝean"), which meant both "facing towards" and "in opposition to". The modern form developed through Middle English, influenced by Scandinavian forms such as Old Norse "gegn", and gradually settled into its current shape. Its sibling "again" comes from the identical root, but the two words separated in meaning during the medieval period — "again" came to denote repetition while "against" retained the sense of opposition and contact.
How against is actually used
"Against" functions almost exclusively as a preposition in modern English; its occasional adverbial uses are now archaic or dialectal. In sports and politics it commonly signals an opposing side, and in phrases like "against all odds" or "against the clock" it carries a sense of adversity or urgency.
Easily confused with against
"Again" means one more time or a repetition of something, while "against" expresses opposition, contrast, or physical contact with something.