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Meaning of divemaster

dive•mas•ter

Pronunciation: (dīv'mas"tur, -mä"stur), [key]
— n.
  1. a professional qualified to oversee scuba diving operations, as in salvage work or at a resort, and responsible for procedures and safety, monitoring the whereabouts of divers underwater or at the surface, and making rescues when necessary.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.