a. [ Gr. &unr_; the depth of the sea. ] Relating to the deepest zone or region of the ocean. [ 1913 Webster ]

a. Of or pertaining to Bentham or Benthamism. [ 1913 Webster ]

n. That phase of the doctrine of utilitarianism taught by Jeremy Bentham; the doctrine that the morality of actions is estimated and determined by their utility; also, the theory that the sensibility to pleasure and the recoil from pain are the only motives which influence human desires and actions, and that these are the sufficient explanation of ethical and jural conceptions. [ 1913 Webster ]

n. One who believes in Benthamism. [ 1913 Webster ]