- (prenominal)
unsurpassed in some respect at a particular time
WordReference Random House Learner's Dictionary of American English © 2025
ˈall-ˌtime,
adj. [before a noun]
WordReference Random House Unabridged Dictionary of American English © 2025- never equaled or surpassed: Production will reach an all-time high.
- regarded as such in its entire history: an all-time favorite song.
all-time
(ôl′tīm′),USA pronunciation adj.
- never surpassed or greater:Production will reach an all-time high.
- regarded as such in its entire history:an all-time favorite song.
- 1910–15
Collins Concise English Dictionary © HarperCollins Publishers::