a room or place set apart for young children.

a nursery school or day nursery.

a place where young trees or other plants are raised for transplanting, for sale, or for experimental study.

any place in which something is bred, nourished, or fostered

The art institute has been the nursery of much great painting.

any situation, condition, circumstance, practice, etc., serving to breed or foster something

Slums are nurseries for young criminals.

noun

crche (public nursery) , greenhouse , playroom , preschool