<p><strong>Noun</strong></p><ul><li>something that threatens to cause evil, harm, injury, etc.; a threat:<ul><li>Air pollution is a menace to health.</li></ul></li><li>a person whose actions, attitudes, or ideas are considered dangerous or harmful:<ul><li>When he gets behind the wheel of a car, he's a real menace.</li></ul></li><li>an extremely annoying person.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) menaced, menacing: to utter or direct a threat against; threaten.</li><li>to serve as a probable threat to; imperil:<ul><li>overdevelopment that menaces our suburbs.</li></ul></li><li>(used without object) menaced, menacing: to express or serve as a threat.</li></ul>