noun

1. a person, animal, or thing that creeps
2. any plant whose stem puts out tendrils or rootlets by which it can creep along a surface as it grows the Virginia creeper
3. any of various small passerine birds (esp. family Certhiidae) that creep on trees, bushes, or walls looking for insects, larvae, etc. to eat, including the wall creeper, certain wood warblers, etc.
4. a device with metal hooks for dragging the bottom of a lake, pond, etc.; grapnel
5. ☆ a metal plate with spikes, fastened to a shoe to prevent slipping
6. any device for carrying material to or from a machine, or from one part of a machine to another
7. ☆ a low frame on wheels or casters for a mechanic to lie on when working under an automobile
8. the lowest gear in a truck, as for use on steep grades
   in full, creeper gear
9. ☆ a baby's one-piece garment, combining pants and shirt