see at latest
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at the latest
Not later than (a stated time)
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Main Entry: ↑late
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at the latest phrase
no later than a particular time
He said he’d be here by 10.00 at the latest.
Thesaurus: at a specific time in the futuresynonym
Main entry: latest
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no later than the time specified
all new cars will be required to meet this standard by 1997 at the latest
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at the ˈlatest idiom
no later than the time or the date mentioned
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Applications should be in by next Monday at the latest.
Useful english dictionary. 2012.