all-time Meaning in the Cambridge English Dictionary
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Meaning of “all-time” in the English Dictionary

"all-time" in British English

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all-timeadjective [before noun]

uk   /ˌɔːlˈtaɪm/  us   /ˌɑːl-/
An all-time high, ​low, ​best, etc. is the ​highest, ​lowest, ​best, etc. ​level that has ​ever been: After three ​years of ​drought, the ​water in the ​lake had ​reached an all-time ​low.
(Definition of all-time from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"all-time" in Business English

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all-timeadjective [before noun]

uk   us   /ˌɔːlˈtaɪm/
the ​highest, ​lowest, best, etc. that something has ever been: an all-time high/low/record In October, the ​stockhit an all-time high of $90.
(Definition of all-time from the Cambridge Business English Dictionary © Cambridge University Press)
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