See also: muga, and mūga English Noun MUGA (plural MUGAs) Acronym of multiple gated acquisition scan; a medical test used for assessing ventricular function of the heart. (architecture) Acronym of multiuse games area. Anagrams GUAM, Guam, Guma, Umag, gaumWikiwand - on Seamless Wikipedia browsing. On steroids.