Tic
Definition 1 of 3
Pro Tip 1/3
Involuntary Action
A tic is an involuntary movement or sound that a person cannot control. Even during his presentation, his nervous tic appeared.
Pro Tip 2/3
Not Persistent
Tics are usually temporary and could be caused by stress or tiredness. Her eye tic only shows up when she's exhausted.
Pro Tip 3/3
Medical Condition
Frequent or severe tics can be a sign of a medical condition like Tourette syndrome. He was diagnosed with a condition that makes him have tics.