Definition of in date in US English:

in date

adjective

  • Valid, current, unexpired; fashionable, in vogue; (of a perishable product) fit for use or consumption, not past the sell-by date. Also as adverb Opposed to "out of date [adverb]". Compare also "up to date [adjective]".

Origin

1940s. From in + date, after out of date.

Pronunciation

in date

/ˌɪn ˈdeɪt/