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English definition of “long”

long

adverb     /lɒŋ/
A2 for a long time: We didn't have to wait long for the train. The band played long into the night.Long periods of time
as long as B1 used when you are talking about something that must happen before something else can happen: You can play football as long as you do your homework first.Connecting words which express a condition
before long B2 soon: He'll be home before long.In the future and soon
long ago If something happened long ago, it happened a great amount of time ago.In the past
no longer/not any longer B1 not now: He no longer works here.In the past
(Definition of long adverb from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “long” in other dictionaries

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