1 a (of a person) having frequent and diverse sexual relationships, esp. transient ones. b (of sexual relationships) of this kind.
2 of mixed and indiscriminate composition or kinds; indiscriminate (promiscuous hospitality).
3 colloq. carelessly irregular; casual.
Derivatives:
promiscuity n. promiscuously adv. promiscuousness n.
Etymology: L promiscuus (as PRO-(1), miscere mix)
Useful english dictionary. 2012.