Pronunciation: (nē"u-lith'ik),[key] —adj. 1. (sometimes l.c.)Anthropol.of, pertaining to, or characteristic of the last phase of the Stone Age, marked by the domestication of animals, the development of agriculture, and the manufacture of pottery and textiles: commonly thought to have begun c9000–8000b.c.in the Middle East. Cf. Mesolithic, Paleolithic. 2. (usually l.c.) belonging to or remaining from an earlier era; outdated; passé.