Definify.com
Webster 1913 Edition
Strait-jacket
Strait′-jackˊet
,Noun.
A dress of strong materials for restraining maniacs or those who are violently delirious. It has long sleeves, which are closed at the ends, confining the hands, and may be tied behind the back.
Webster 1828 Edition
Strait-jacket
STRAIT-WAISTCOAT
, STRAIT-JACKET,Noun.