in·ter·na·tion·al·ize (?n?t?r-n?sh??-n?-l?z?)tr.v. in·ter·na·tion·al·ized, in·ter·na·tion·al·iz·ing, in·ter·na·tion·al·iz·es 1. To make international.2. To put under international control.in?ter·na?tion·al·i·za?tion (-l?-z??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.