or free diving F5310150 (frē′dī′vĭng)n. Surface diving or underwater swimming without the use of an artificial breathing apparatus, especially the sport of surface diving as deeply as possible on a single breath of air.free dive n. & v.
freediving
(ˈfriːdaɪvɪŋ) n (Swimming, Water Sports & Surfing) the sport or activity of diving without the aid of breathing apparatusfreedivern