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Definitions

trump card

[truhmp kahrd, truhmp kahrd] / ˈtrʌmp ˌkɑrd, ˈtrʌmp ˈkɑrd /
NOUN
key advantage
Synonyms
STRONG
assistance
WEAK
ace in the hole ace up one's sleeve advantage aid asset card up one's sleeve edge help influence key resource lead leg up leverage luck odds position power protection secret weapon superiority upper hand whip hand
Antonyms
STRONG
disadvantage
WEAK
short end

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For decades, Iran has held a single geopolitical trump card in its pocket — the ability to shut down oil-tanker traffic in the Strait of Hormuz.

From MarketWatch • Apr. 15, 2026

England rolled out six slow bowling options, with part-timer Joe Root turning out to be an unlikely trump card.

From Barron's • Jan. 24, 2026

Rare earths aren’t Mr. Xi’s only trump card.

From The Wall Street Journal • Oct. 27, 2025

Archer, the trump card, has shown a recent robustness.

From BBC • Sep. 23, 2025

I’m supposed to say what suit I’m picking to be the trump card before the rest of the cards are dealt.

From "Amina's Song" by Hena Khan