intransitive verb
Definition: To move suddenly and quickly in a way that is not smooth, often in small jerks or spasms.
Example: The dog began to twitch when it heard a loud noise.
noun
Definition: A quick, involuntary movement of a muscle or a sudden pull or jerk.
Example: She felt a twitch in her eye during the presentation.
transitive verb
Definition: To make a quick, sudden movement or jerk, often in a way that is unexpected.
Example: She twitched the curtain aside to see what was happening outside.