(underwater diving) The set of equipment required by a scuba diver to be at ease when submerged for extended periods of time. Modern equipment sets include tanks containing mixes of nitrogen in varied ratios with oxygen, a buoyancy control device, a first- and second-stage regulator (to allow the regulated flow of gas from the tank into the user's respiratory system), a wetsuit and accessories for heat insulation, fins for underwater propulsion, a mask (to see underwater), and a snorkel (for moving around the surface of the water without using up breathing gas). Many divers also choose to dive with a diving knife (in case of a tangle with a net, etc.), and night divers may also dive with a waterproof flashlight.

To depart on a voyage by boat.

(linguistics) A set of concepts whose names are coordinate terms.

(computing) The set of machine instructions that a particular CPU can execute; the corresponding set of assembly language mnemonics.

(idiomatic) Possessing sufficient resources, especially financial, to last a lifetime.

plural of character set

Unswervingly dedicated; resolutely determined. / (Australia, colloquial) Complete and utter; total.

(hunting) The rigid pose a hunting dog assumes when pointing out game to a hunter. / A fixed or stationary condition arising from obstacle or hindrance; a deadlock.

plural of arithmetical set

plural of open set