(chiefly uncountable) The state of being a child. / The time during which one is a child, from between infancy and puberty. / (by extension) The early stages of development of something.

plural of childhood

(idiomatic) The period or state of cognitive decline of an elderly person, characterized by childlike judgment and behavior.

A stage in human development, generally including toddlerhood and some time afterwards.

plural of childhood friend

plural of second childhood

plural of early childhood

(psychiatry) A rare condition characterized by deterioration of language, social function, and motor skills in a child after normal development for the child's first three years.

The formal teaching and care of young children by people other than their family, or in settings outside of the home, before the age of normal schooling.