Definition of "debut"

debut

/ˈdɛbjuː/

noun
plural debuts
1. A performer's first performance to the public, in sport, the arts or some other area.
  Quotations
  Liverpool's performance - despite a defensive injury crisis that saw a promising debut for teenage academy graduate John Flanagan - was a resounding advert for Kenny Dalglish to be given the manager's job on a permanent basis.
  2011 April 11, Phil McNulty, “Liverpool 3 - 0 Man City”, in BBC Sport‎
  Hulking defenceman Gudbranson, who came to Vancouver in a trade with the Florida Panthers last May, scored in his debut for the Canucks.
  2016 September 29, Jason Keller, Eberle-McDavid-Lucic line debuts in Oilers pre-season loss to Canucks, CBC (Canada)
2. (also attributive) The first public presentation of a theatrical play, motion picture, opera, musical composition, dance, or other performing arts piece.
3. The first appearance of a debutante in society.
4. (Philippines) The coming-of-age celebration of a woman's eighteenth birthday.
verb
third-person singular simple present debuts, present participle debuting, simple past and past participle debuted
1. (transitive, chiefly US) to formally introduce, as to the public
2. (intransitive) to make one's initial formal appearance
  Quotations
  The nine-car electric unit debuted on the 0630 Newcastle-London King's Cross.
  2020 April 8, “Fleet News: News in Brief”, in RAIL, page 29