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.

Dictionary Entries Near an ace up one's sleeve

Cite this Entry

“An ace up one's sleeve.” Dictionary, Merriam-Webster, Accessed 15 Jun. 2024.

Love words? Need even more definitions?

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