infantile Meaning, Definition & Usage

  1. adjective satellite indicating a lack of maturity
    childish.
    • childish tantrums
    • infantile behavior
  2. adjective of or relating to infants or infancy
    • infantile paralysis
  3. adjective satellite being or befitting or characteristic of an infant
    • infantile games

WordNet

In"fan*tile adjective
Etymology
L. infantilis: cf. F. infantile. See Infant.
Definitions
  1. Of or pertaining to infancy, or to an infant; similar to, or characteristic of, an infant; childish; as, infantile behavior.

Webster 1913