Entry 2 senses · 2 variants Webster, 1913 Outcrop · Out·crop · IPA /ˈaʊt.kɹɑp/ n. v. i. 01 n. The coming out of a stratum to the surface of the ground. 1. The coming out of a stratum to the surface of the ground.(Geol.) 02 v. i. To come out to the surface of the ground; -- said of strata. 1. To come out to the surface of the ground; -- said of strata.(Geol.)