• out-of-date (adjective before noun only)

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out of date

1. (idiomatic) Too old to be used; not current; invalid; outmoded.

   My bus pass is out of date — I'll have to go buy a new one.

   I can't eat this salad, it's out of date.

   • 1947 January and February, “Notes and News: Steamer Services on the Clyde”, in Railway Magazine, page 50:

     Owing to the time lag which must occur between the dates of closing for press and publication, it sometimes happens that items of news are out of date, or inaccurate, by the time they reach readers.

2. (idiomatic) Not conforming to the current fashion or style; old-fashioned.

   The dresses she wears are quite out of date.

• (too old to be used): antiquated, archaic, old-fashioned, outdated, parachronistic; see also Thesaurus:obsolete
• (not conforming to the current fashion): démodé, old-fashioned, unhip; see also Thesaurus:unfashionable

• up to date
• (antonym(s) of “too old to be used”): in date