Entry 2 senses · 2 variants Webster, 1913 Oversupply /ōvˌ-ẽrs-əp-lī'/ · O·ver·sup·ply · IPA /əʊvəsəˈplʌɪ/ v. t. n. 01 v. t. To supply in excess. 1. To supply in excess. 02 n. An excessive supply; a supply in excess of demand. 1. An excessive supply; a supply in excess of demand. “A general oversupply or excess of all commodities.” — J. S. Mill.