1a restriction on a person or activity:the strictures imposed by the British Board of Film Censors
2a sternly critical or censorious remark or instruction:his strictures on their lack of civic virtue
3 Medicine abnormal narrowing of a canal or duct in the body:a colonic stricture [mass noun]:jaundice caused by bile duct stricture
late Middle English(in sense 3): from Latin strictura, from stringere 'draw tight' (see strict). Another sense of the Latin verb, 'touch lightly', gave rise to sense 2 via an earlier meaning 'incidental remark'