1. A person authorized to examine books, films, or other material and to remove or suppress what is considered morally, politically, or otherwise objectionable.

2. An official, as in the armed forces, who examines personal mail and official dispatches to remove information considered secret or a risk to security.

3. One that condemns or censures.

4. One of two officials in ancient Rome responsible for taking the public census and supervising public behavior and morals.

5. Psychology The component of the unconscious that is posited by psychoanalytic theory to be responsible for preventing certain thoughts or feelings from reaching the conscious mind.