n. pl. dol·lies 1. Informal A child's doll.
2. a. A low mobile platform that rolls on casters, used for transporting heavy loads.
b. Such a platform as used by one working underneath a motor vehicle.
c. A hand truck.
3. a. A wheeled apparatus used to transport a movie camera steadily along the ground or along a track.
b. A movie shot made by a camera moving steadily on a dolly; a tracking shot.
4. A small locomotive, as for use in a railroad yard or on a construction site.
5. A wooden implement for stirring clothes in a washtub.
6. A tool used to hold one end of a rivet while the opposite end is being hammered to form a head.
7. A small piece of wood or metal placed on the head of a pile to prevent damage to the pile while it is being driven.