Entry 2 senses · 2 variants Webster, 1913 Mining /mīn'-ĭng/ · Min·ing · IPA /ˈmaɪnɪŋ/ n. a. 01 n. The act or business of making mines or of working them. 1. The act or business of making mines or of working them. 02 a. Of or pertaining to mines; as, mining engineer; mining machinery; a mining region. 1. Of or pertaining to mines; as, mining engineer; mining machinery; a mining region. Phrases & compounds Mining engineering — See the Note under Engineering.