opposed to; in conflict or disagreement with standing or leaning beside or in front of: a ladder against the wall coming in contact with in contrast to: silhouettes are outlines against a light background having an adverse or unfavourable effect on: the economic system works against small independent companies as a protection from or means of defence from the adverse effects of: a safeguard against contaminated water in exchange for or in return for in preparation for: he gave them warm clothing against their journey through the night - as against ⇒
as opposed to or as compared with
WordReference Random House Learner's Dictionary of American English © 2025
a•gainst /əˈgɛnst/USA pronunciation
prep.
WordReference Random House Unabridged Dictionary of American English © 2025- in opposition to;
contrary to:twenty votes against ten. - in resistance to or defense from:protection against mosquitoes.
- in an opposite direction to:walking against the wind.
- in or into contact with;
upon:Don't lean against the door. - in preparation for:saving money against a rainy day.
- having as background: a design of flowers against a dark wall.
- Businessto be deducted from:The loan was an advance against salary.
- in competition with:a race against time.
- in contrast with:Use reason as against emotion.
- have something against, [~ + object] to be in opposition to;
be opposed to:She has something against my attending the class.
a•gainst
(ə genst′, ə gānst′),USA pronunciation prep.
conj.
- in opposition to;
contrary to;
adverse or hostile to:twenty votes against ten; against reason. - in resistance to or defense from:protection against burglars.
- in an opposite direction to:to ride against the wind.
- into contact or collision with;
toward;
upon:The rain beat against the window. - in contact with:to lean against the wall.
- in preparation for;
in provision for:money saved against a rainy day. - having as background:a design of flowers against a dark wall.
- Businessin exchange for;
as a balance to or debit or charge on:He asked for an advance against his salary. - in competition with:a racehorse running against his own record time.
- in comparison or contrast with:a matter of reason as against emotion.
- beside;
near;
before:The car is against the building. - over against, in contrast with:the rich over against the poor.
conj.
- [Archaic.]before;
by the time that.
- 1125–75; Middle English agens, ageynes, equivalent. to ageyn again + -es -s1; for -t compare whilst, amongst
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