ab
(noun, verb, adverb, preposition)
adverb
1. Abbreviation of about.
noun
1. (informal) abdominal muscle. [Mid 20th century.]
2. (slang) An abscess caused by injecting an illegal drug, usually heroin.
3. (US) The early stages of; the beginning process; the start.
preposition
1. Abbreviation of about.
verb
1. Abbreviation of abort.