Definition of play one's ace in English:

play one's ace

Use one’s best resource: deciding to play her ace, Emily showed the letter to Vic
More example sentences
  • And when men have triumphed in their arguments with women, the women play their ace: they say, as Molly Bloom did, ‘Yes.’
  • But just when it could all fall over at the last hurdle, he plays his ace.
  • When I played my ace - enlisting his family to twist his arm - he only grew more obstinate.
See parent entry: ace

Definition of play one's ace in:

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Word of the day flagitious
Pronunciation: fləˈdʒɪʃəs
(of a person or their actions) criminal; villainous