Entry 1 sense Webster, 1913 Prospector /prôs'-pĕkˌ-tẽr/ · Pros·pect·or · IPA /ˈpɹɑsˌpɛktɚ/ 01 n. One who prospects; especially, one who explores a region for minerals and precious metals. 1. One who prospects; especially, one who explores a region for minerals and precious metals.