A childish action. Obsolete.

= childhood, n. 2b. Obsolete.

As a count noun: an instance, embodiment, or display of childishness, immaturity, or triviality; (in later use also spec. in plural) juvenilia.

Puerile behaviour, childishness.

As a count noun: an instance of immature or foolish behaviour.

Childish language or argument; a childish practice.

youthfulness; plural youthful acts or follies.

Babyishness. Also: a babyish act, utterance, etc.

An act performed by a baby or young child; an act performed in an infantile manner; a babyish act.