o·ver·sub·scribe (??v?r-s?b-skr?b?)tr.v. o·ver·sub·scribed, o·ver·sub·scrib·ing, o·ver·sub·scribes To subscribe for (something) in excess of available supply: The opera season was oversubscribed.o?ver·sub·scrip?tion (-skr?p?sh?n) n.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.oversubscribed (???v?s?b?skra?bd) adj1. (Commerce) having more prospective buyers, clients, etc than can be supplied2. (Stock Exchange) stock exchange (of a share issue) having more investors wishing to buy than can be suppliedCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014