Entry 2 senses · 2 variants Webster, 1913 Free-living · Free·-liv·ing · IPA n. adj. 01 n. Unrestrained indulgence of the appetites as a way of life. 1. Unrestrained indulgence of the appetites as a way of life. 02 adj. Living independently of other organisms; not parasitic or commensal. 1. Living independently of other organisms; not parasitic or commensal.(Biology) Syn. nonparasitic, nonsymbiotic.