intransitive verb. To take care of a child or children in the absence of a parent or guardian.

intransitive verb. To take care of or watch over someone or something needing attention or guidance.

intransitive verb. To provide care for (a child) in the absence of a parent or guardian.

intransitive verb. To watch over or tend.

verb. To watch or tend someone else's child for a period of time, often for money.

verb. To watch or attend anything or anyone unnecessarily closely; to have to help or coax too much.

"McGovern, meanwhile, continued to "babysit" the film, now at Norton Air Force base in California."

babysitter  

babysat  babysits  babysitting