say it: awl-TAHYM
all-time is an adjective meaning "unsurpassed in some respect up to the present". It carries one recorded sense.
unsurpassed in some respect up to the present
“prices at an all-time high”
“morale at an all-time low”
“among the all-time great lefthanders”
Definitions, synonyms and semantic relations for all-time come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.