outcrop Syllabification: (out·crop)Pronunciation: /ˈoutˌkräp/Translate outcrop | into Italian | into Spanish Definition of outcrop noun a rock formation that is visible on the surface:dramatic limestone outcrops verb (outcrops, outcropping, outcropped) (often as noun outcropping) [no object] appear as an outcrop. Derivatives outcropping noun outcrop in other Oxford dictionaries Definition of outcrop in the British & World English dictionary