D defs.my
Entry 2 senses Webster, 1913

libido

/(lĭ*bē"dō̇)/ · li·bi·do · IPA /lɪˈbiː.dəʊ/
01 n. Sexual desire; the sexual instinct; the sex drive.
  1. 1.
    Sexual desire; the sexual instinct; the sex drive.
  2. 2.
    Those desires and instinctual energies which are derived from the id.(Psychoanalysis)