licentious /laɪˈsɛn.ʃəs/ adjective2 •Disregarding accepted rules. •(disapproving) Lacking restraint, or ignoring societal standards, particularly in sexual conduct; sexually unprincipled.His eyes trailed over her feline pose on the sofa, finding her limbs adorable while he tried exasperatedly to extract the truth of licentious revelations from them. — 1930 formsmore licentious · most licentious