out-of-date

the compound adjective "out-of-date" is a relatively modern english formation, built from three pre-existing english words. the logic is transparently spatial and temporal: something that is "out of" its proper "date" or time period is left behind, no longer current. the word "date" itself has a fascinating journey, originating from the latin phrase "data (epistola)" meaning "(a letter) given," which referred to the notation of when and where it was issued. by the 14th century, "date" in english had narrowed to signify the specific time of an event. the phrase "out of date" emerged in the late 16th century, solidifying into the hyphenated adjective form in the 19th century to describe anything from expired food to obsolete ideas, perfectly capturing the concept of being separated from the present time.

Structure: out (outside) + of (belonging to) + date (point in time) out: old english origin, meaning "outside, away, forth". functions as an adverb/particle indicating separation or removal. of: old english origin, a preposition indicating origin, source, or belonging. date: from old french, ultimately from latin 'data', meaning "given". functions as a noun referring to a specific point in time.