Pronunciation: (tī'mur), [key]
1. a person or thing that times.
2. a person who measures or records time.
3. a device for indicating or measuring elapsed time, as a stopwatch.
4. a device for controlling machinery, appliances, or the like, in a specified way at a predetermined time: Please put the roast in the oven and set the timer to cook it for two hours.
5. (in an internal-combustion engine) a set of points actuated by a cam, which causes the spark for igniting the charge at the instant required.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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