against

American  

[uh-genst, uh-geynst] / əˈgɛnst, əˈgeɪnst /

preposition

1. in opposition to; contrary to; adverse or hostile to: against reason.

   twenty votes against ten;

   against reason.

2. in resistance to or defense from.

   protection against burglars.

3. in an opposite direction to.

   to ride against the wind.

4. into contact or collision with; toward; upon.

   The rain beat against the window.

5. in contact with.

   to lean against the wall.

6. in preparation for; in provision for.

   money saved against a rainy day.

7. having as background.

   a design of flowers against a dark wall.

8. in exchange for; as a balance to or debit or charge on.

   He asked for an advance against his salary.

9. in competition with.

   a racehorse running against his own record time.

10. in comparison or contrast with.

    a matter of reason as against emotion.

11. beside; near; before.

    The car is against the building.

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conjunction

1. Archaic. before; by the time that.

idioms

1. over against,

   1. positioned across from or opposite; facing.

      The debate teams were seated over against each other.

   2. in contrast with.

      rich people over against poor people.

against British  

/ əˈɡɛnst, əˈɡeɪnst /

preposition

1. opposed to; in conflict or disagreement with

   they fought against the legislation

2. standing or leaning beside or in front of

   a ladder against the wall

3. coming in contact with

   the branches of a tree brushed against the bus

4. in contrast to

   silhouettes are outlines against a light background

5. having an adverse or unfavourable effect on

   the economic system works against small independent companies

6. as a protection from or means of defence from the adverse effects of

   a safeguard against contaminated water

7. in exchange for or in return for

8. rare in preparation for

   he gave them warm clothing against their journey through the night

9. as opposed to or as compared with

   he had two shots at him this time as against only one last time

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against More Idioms  

More idioms and phrases containing against

• beat one's head against the wall
• cards are stacked against
• come up against
• count against
• dead set against
• guard against
• have something against
• hold something against
• lift a hand against
• over against
• pit someone against
• run against
• set against
• swim against
• turn against
• two strikes against
• up against

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Etymology

Origin of against

First recorded in 1125–75; Middle English agens, ageynes, equivalent to ageyn again + -es -s ¹; for -t whilst, amongst

Example Sentences

The White House warned staff on March 24 against improperly leveraging their positions to place well-timed bets in futures markets.

From The Wall Street Journal • Apr. 10, 2026

The only meaningful safeguard is Step 3, when courts test those explanations against reality.

From Slate • Apr. 10, 2026

The debate has sparked class-action lawsuits against several businesses, including retailer Costco, RayBans-maker EssilorLuxottica and Fabletics, the clothing brand founded by Kate Hudson, which at one point broke out tariff costs on its receipts.

From BBC • Apr. 10, 2026

Redick admitted the Lakers were not prepared to compete against the Thunder at home Tuesday.

From Los Angeles Times • Apr. 10, 2026

He took his monocle from the chain and struck it against a rock, spraying hungry sparks over the pile of tinder.

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman