"psychic drive or energy, usually associated with sexual instinct," 1909, in A.A. Brill's translation of Freud's "Selected Papers on Hysteria," from L. libido "desire, lust," from libere "to be pleasing, to please," ultimately cognate with O.E. lufu (see love).
Main Entry: li·bi·do Pronunciation: l&-'bEd-(")O also 'lib-&-"dO or l&-'bI-(")dO Function: noun Inflected Form: plural-dos 1: emotional or psychic energy that in psychoanalytic theory is derived from primitive biological urges and that is usually goal-directed 2: sexual drive