Meaning of “child” - Learner’s Dictionary

child

noun [ C ] us uk /tʃaɪld/ plural children
YOUNG PERSON

A1 a young person who is not yet an adult:

an eight-year-old child
How many children are there in your class?

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SON/DAUGHTER

A1 someone's son or daughter, also when they are adults:

Both our children have grown up and moved away.
→ See also only child

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(Definition of “child” from the Cambridge Learner’s Dictionary © Cambridge University Press)