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all-time

adjective

adjective Definition from Wiktionary (CC BY-SA). More about all-time at Wordnik → Where our words come from →

  1. Of all time; unsurpassed up to the present time.
    Sales have reached an all-time low, so the business may have to declare bankruptcy.

Origin

From all + time.

From Wiktionary, via Kaikki.org (CC BY-SA)