Definitions
1.NounA jacketlike garment with very long sleeves which can be secured in place, thus preventing the wearer from moving their arms; often used in psychiatric hospitals to prevent patients from injuring themselves or others.
2.NounAny situation seen as confining or restricting."our ever-increasing bureaucratic straitjacket of regulations"
3.VerbTo put someone into a straitjacket.
4.VerbTo restrict the freedom of someone or something, either physically or psychologically.