Mad

1. (adj) (chiefly US; informal in UK and Ireland) Angry, annoyed. 2. (adj) (chiefly British Isles) Insane; crazy, mentally deranged. 3. (adj) Wildly confused or excited. 4. (adj) Extremely foolish or unwise; irrational; imprudent. 5. (adj) (colloquial, usually with for or about) Extremely enthusiastic about; crazy about; infatuated with; overcome with desire for. 6. (adj) (UK, Ireland, informal) Bizarre; incredible. 7. (adj) (chiefly in the negative, informal) Used litotically to indicate satisfaction or approval. 8. (adv) (slang, chiefly New York, African-American Vernacular, UK and Ireland, dialectal) Intensifier; to a large degree; extremely; exceedingly; very; unbelievably. 9. (adj) (slang, chiefly New York, African-American Vernacular) Intensifier, signifying abundance or high quality of a thing; very, much or many. 10. (adj) (of animals) Abnormally ferocious or furious; or, rabid, affected with rabies. 11. (v) (now colloquial US, Jamaica) To madden, to anger, to frustrate. 12. (v) (obsolete, intransitive) To be or become mad. 13. (adj) (of a compass needle) Having impaired polarity. 14. (n) Initialism of mutual assured destruction or mutually assured destruction. 15. (n) Initialism of magnetic anomaly detector. 16. (n) (medicine, ENT, dental, prosthetics) Initialism of mandibular advancement device. 17. (n) (programming) Acronym of Michigan algorithm decoder, a programming language, a variant of ALGOL, developed in 1959 at the University of Michigan. 18. (n) (astrophysics) Acronym of magnetically-arrested disc, a type of black hole accretion disc). 19. (n) (genetics) Initialism of mothers against decapentaplegic. 20. (n) (genetics) Acronym of mothers against decapentaplegic.