Definition of "pacer" in English

noun

1. One who paces.

2. In harness racing, a horse with a gait in which the front and back legs on one side take a step together alternating with the legs on the other side; as opposed to a trotter.

3. A pacemaker (one who sets the pace in a race).

4. A timer in an electric toothbrush that indicates how long the user should spend brushing in each part of the mouth.

noun

1. (Australia) A mechanical pencil.