timer

Definitions of timer
1

n (sports) an official who keeps track of the time elapsed

Synonyms:
timekeeper
Type of:
official
someone who administers the rules of a game or sport

n a timepiece that measures a time interval and signals its end

Types:
chronograph
an accurate timer for recording time
parking meter
a coin-operated timer located next to a parking space; depositing money into it entitles you to park your car there for a specified length of time
stop watch, stopwatch
a timepiece that can be started or stopped for exact timing (as of a race)
Type of:
horologe, timekeeper, timepiece
a measuring instrument or device for keeping time

n a regulator that activates or deactivates a mechanism at set times

Type of:
governor, regulator
a control that maintains a steady speed in a machine (as by controlling the supply of fuel)

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