A stopwatch is a timer that you can use to time events. You can use it to time a race, a competition, or anything else that you want to measure.
The race was stopped after only 10 minutes because the stopwatch had run out of time.
The stopwatch was used to time the competition, and it ended after just three minutes.
noun
a timepiece that can be started or stopped for exact timing (as of a race)
Synonyms:
1
It can be played competitively with the aid of a stopwatch.
2
I think the picture of a stopwatch and odometer showing 1337 are useless.
3
These models are timed with a stopwatch.
4
Official time was kept by stopwatch.
5
A timer or a stopwatch may be required.
6
He frequently appears with a stopwatch in hand.
7
I'm assuming a stopwatch would help....
8
Set a stopwatch and time your progress.
9
My watch has a stopwatch function.
10
It can played competitively with the aid of a stopwatch.