(computing) A form of garbage collection in which every accessible object in memory is flagged, leaving unflagged only those that are no longer reachable and can thus be discarded.

A marking in a tree or other piece of wood created with a tomahawk, often used to denote property boundaries in frontier settings.

plural of cue mark

plural of irony mark

A circle that serves as a check mark in Japanese: ◯.

A symbol composed of two perpendicular lines (✗), especially when representing negation or lack of verification.

plural of X mark

plural of O mark

The conspicuous signs of artery and vein damage brought on by chronic injection of drugs.

(idiomatic) something that negatively affects someone's reputation