child

Concise Oxford English Dictionary © 2008 Oxford University Press:
child/tʃʌɪld/

▶noun (pl. children)

• 1 a young human being below the age of full physical development.

  ■ a son or daughter of any age.

• 2 derogatory an immature or irresponsible person.

• 3 (children) archaic the descendants of a family or people.

– phrases
child's play a task which is easily accomplished.
with child archaic pregnant.

– derivatives
childhood noun,
childless adjective,
childlessness noun.

– origin OE cild, of Gmc origin.