twitches; twitched; twitching
1
: to make a slight, sudden movement that is not controlled or deliberate
His left leg twitched.
Her mouth was twitching as she began to cry.
2
: to move or pull (something) with a sudden motion
The rabbit twitched its ears.
plural twitches
1
: a slight, sudden movement of a muscle or body part that you do not control
sudden muscle twitches
a twitch of pain
2
: a sudden and quick movement or change
Economists are studying every twitch and hiccup of the business cycle.
Cite this Entry
“Twitch.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/twitch. Accessed 8 Apr. 2026.
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