Meaning of “one by one” in the English Dictionary

british dictionary

"one by one" in British English

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one by one

B2 separately, one after the other:

One by one the old buildings in the city have been demolished and replaced with new high rises.
They entered the room one by one.

(Definition of “one by one” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"one by one" in American English

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one by one

one person or thing following another in order:

The children filed out of the bus, one by one.

(Definition of “one by one” from the Cambridge Academic Content Dictionary © Cambridge University Press)

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