edit Verb. debut third person singular simple present debuts, present participle debuting, simple past and past participle debuted transitive, chiefly US to noun . 1. a first public appearance on a stage, on television, etc. 2. the first appearance of something, as a new product. 3. of a young woman a formal introduction and debuted Wiktionary Definition from Wiktionary, the free dictionary With new Nike Flyknit technology, yarns and fabric variations are precisely engineered only where they are needed for a featherweight, formfitting and virtually seamless upper. Tags: nike, nike, engineers, Nike is launching a Twitter reservation system for their highly anticipated sneaker product launches, which have attracted police in riot gear as often as customers noun. a first appearance before the public, as of an actor the formal introduction of a young woman into society the beginning of a career, course, etc.