Bedeutung von “all-time” — Learner’s Dictionary

all-time

adjective [ always before noun ] us uk /ˌɔːlˈtaɪm/

If something is at an all-time best/high/low, etc, it is the best/highest/lowest, etc it has ever been.

(Definition von “all-time” aus dem Cambridge Learner's Dictionary © Cambridge University Press)