babysitter

n. one who supervises children while the parents are away from home

Babysitting is the practice of temporarily caring for a child on behalf of the child's guardians. Babysitting is most commonly performed as an odd job by teenagers for extra money, stereotypically girls. A babysitter is distinguished from a nanny by the term of employment; while some parents may have a regular babysitter "on retainer," so to speak, the sitter is normally contracted one night at a time.
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Noun
1. a person engaged to care for children when the parents are not home
(synonym) baby-sitter, sitter
(hypernym) keeper
(derivation) baby-sit, sit

n. baby sitter, person hired to take care of a child or children

n. baby sitter, person hired to take care of a child or children (as when the parents are away for the evening)