noun
stopwatch
noun
1
A handheld or wearable timer used to measure exactly how long something takes.
"The coach clicked the stopwatch as the runners crossed the line."
How to Use Stopwatch
Learner’s notesIn plain EnglishA device for precisely timing an activity from start to finish.
Common pairings
click a stopwatch
time with a stopwatch
Word Forms
stopwatched past tense, stopwatches plural, stopwatches singular
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The coach clicked the _____ as the runners crossed the line.
Etymology
From stop plus watch.