strait ‧ jack ‧ et BrE AmE , straightjacket /ˈstreɪtˌdʒækət, ˈstreɪtˌdʒækɪt/ noun [countable]
[ Date: 1800-1900 ; Origin: strait 'narrow, tight' ( ⇨ ↑ strait ) + jacket ]
1 . a special piece of clothing that prevents someone from moving their arms, used to control someone who is being violent or, in the past, someone who was mentally ill
2 . something such as a law or set of ideas that puts very strict or unfair limits on someone:
the straitjacket of censorship