an ace up one's sleeve

idiom

Definition of an ace up one's sleeve

: a powerful and often secret weapon, advantage, etc., that can be used if it is needed The mayor's popularity among elderly voters gives him an ace up his sleeve for the coming election.

Comments on an ace up one's sleeve

What made you want to look up an ace up one's sleeve? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a period when something is suspended

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!