|Origin:||, past participle of constringere; CONSTRAIN|
1 [intransitive and transitive]
to make something narrower or tighter, or to become narrower or tighter:
Caffeine constricts the blood vessels in your body.
Linda's throat constricted and she started to cry.
to limit someone's freedom to do what they want:
Fear of crime constricts many people's lives.
—constriction noun [uncountable and countable]