1. Indicating a lack of maturity
   "infantile behaviour"
   - childish 
2. Of or relating to infants or infancy
   "infantile paralysis" 
3. Being or befitting or characteristic of an infant
   "infantile games"

See also: immature, infancy, young

• Mildred Ella Didrikson Zaharias
• mile
• Mile-High City
• mileage
• mileometer
• milepost
• miler
• Miles Davis
• Miles Dewey Davis Jr.
• miles gloriosus
• miles per gallon
• miles per hour
• Miles Standish
• milestone
• MILF
• milfoil
• Milhaud
• miliaria
• miliary
• miliary fever
• miliary tuberculosis
• milieu
• militainment
• militance
• militancy