—n. 1. something that threatens to cause evil, harm, injury, etc.; a threat: Air pollution is a menace to health. 2. a person whose actions, attitudes, or ideas are considered dangerous or harmful: When he gets behind the wheel of a car, he's a real menace. 3. an extremely annoying person.
—v.t. 1. to utter or direct a threat against; threaten.
2. to serve as a probable threat to; imperil.