<p><strong>Verb</strong></p><ul><li>(Used without object) to take charge of a child while the parents are temporarily away.</li><li>(Used with object) to take watchful responsibility for (a child): We're looking for someone to babysit the kids in the evening.</li><li>To take watchful responsibility for; tend: It will be necessary for someone to babysit the machine until it is running properly.</li></ul>