geometric UK /ˌd͡ʒiː.əʊˈmɛt.ɹɪk/US /ˌd͡ʒi.oʊˈmɛt.ɹɪk/ adjective3 •Of or relating to geometry.The architect used geometric techniques to design her home. •Using simple shapes such as circles, triangles, and lines in a decorative object.The building's profile was strikingly geometric. •Increasing or decreasing in a geometric progression.Bacteria exhibit geometric increase in numbers when the environment is not limiting. formsmore geometric · most geometric