first appearance firs·tap·pea·rance uncommon noun 1. the act of beginning something new “they looked forward to the debut of their new product line” Synonymsintroductiondebutfirst appearancelaunchingunveilingentry Related words Word family debut Broader terms beginning Narrower terms inductionproduct introductionushering innaturalization WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
