verb (used without object), ba·by-sat, ba·by-sit·ting.
- to take charge of a child while the parents are temporarily away.
verb (used with object), ba·by-sat, ba·by-sit·ting.
- to baby-sit for (a child): We’ve placed an ad for someone to baby-sit the youngsters in the evening.
- to take watchful responsibility for; tend: It will be necessary for someone to baby-sit the machine until it is running properly.
verb -sits, -sitting or -sat
- (intr) to act or work as a baby-sitter
also baby-sitter, 1914, from baby (n.) + agent noun from sit (v.). Short form sitter is attested from 1937.