mac

noun (often initial capital letter) Informal.

1. fellow; bud (a familiar term of address to a man or boy whose name is not known to the speaker).

noun Informal.

1. a mackintosh.
2. McIntosh.

noun

1. a male given name.

1. a prefix found in many family names of Irish or Scottish Gaelic origin, as MacBride and Macdonald.

1. Maccabees.

1. Master of Accountancy.

noun

1. British informal short for mackintosh (def. 1), mackintosh (def. 3)

noun

1. mainly US and Canadian an informal term of address to a man

abbreviation for

1. multiplexed analogue component: a transmission coding system for colour television using satellite broadcasting

abbreviation for

1. Maccabees (books of the Apocrypha)

prefix

1. (in surnames of Scottish or Irish Gaelic origin) son ofMacDonald; MacNeice

casual, generic term of address for a man, 1928, from Irish and Gaelic mac, a common element in Scottish and Irish names (literally “son of”); hence used generally from early 19c. for “a Celtic Irishman” (see Mac-). common element in Scottish and Irish names, from Old Celtic *makko-s “son.” Cognate root *makwos “son” produced Old Welsh map, Welsh mab, ap “son;” also probably cognate with Old English mago “son, attendant, servant,” Old Norse mögr “son,” Gothic magus “boy, servant,” Old English mægð “maid” (see maiden).