fives /faɪvz/ noun[plural only]4 •(UK) A ball game, somewhat like tennis, played against a wall. •(slang) A pair of fives. •(UK, slang) The cells located on the fourth floor. •(no longer used) Shares at a rate of five percent.Look what the funds were on the 1st of March—what the French fives were when I bought for the count. And what they're at now. — 1847