Definition of preschooler in US English:

preschooler

noun

North American
  • 1A child who is not old enough to go to school.

    ‘the show, aimed at preschoolers, emphasizes the importance of storytelling’
    1. 1.1 A student attending preschool.
      ‘the preschoolers have been busy meeting their classmates and learning the routine’

Pronunciation

preschooler

/ˈprēˌsko͞olər//ˈpriˌskulər/