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English definition of “on the run”

on the run

while busy doing something else: He ate on the run, downing an apple in his car. on the run If criminals are on the run, they are trying to avoid being caught: The two men were on the run for three weeks before being caught by police. on the run Someone or something on the run is at a disadvantage in a competitive situation: Competition from Internet retailers has some big department stores on the run.
(Definition of on the run from the Cambridge Academic Content Dictionary © Cambridge University Press)
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