- a portable breathing device for free-swimming divers, consisting of a mouthpiece joined by hoses to one or two tanks of compressed air that are strapped on the back.
- scuba diving.
verb (used without object), scu·baed, scu·ba·ing.
- an apparatus used in skindiving, consisting of a cylinder or cylinders containing compressed air attached to a breathing apparatus
- (as modifier)scuba diving
1952, acronym for self-contained underwater breathing apparatus.