Ne ‧ o ‧ lith ‧ ic BrE AmE , neolithic /ˌniːəˈlɪθɪk◂/ adjective
[ Date: 1800-1900 ; Origin: neo- + Greek lithos 'stone' ]
relating to the last period of the ↑ Stone Age , about 10,000 years ago, when people began to live together in small groups and make stone tools and weapons:
a Neolithic burial ground