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all-time

[awl-tahym] /ˈɔlˌtaɪm/
adjective
1.
never surpassed or greater:
Production will reach an all-time high.
2.
regarded as such in its entire history:
an all-time favorite song.
Origin
1910-1915
1910-15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for all time

all-time

adjective
1.
(prenominal) (informal) unsurpassed in some respect at a particular time an all-time record at the Olympics
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for all time

all-time

adj.

"during recorded time," 1910, American English, from all + time (n.). Earlier it had been used in a sense "full-time," of employment, or in opposition to one-time (1883).

Online Etymology Dictionary, © 2010 Douglas Harper
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3
5
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