What is the meaning of debut?

noun

• The act of beginning something new.
  • usage: "they looked forward to the debut of their new product line"
  • synonyms: introduction, first appearance, launching, unveiling, entry
• The presentation of a debutante in society.

verb

• Present for the first time to the public.
  • usage: "The band debuts a new song or two each month"
• Appear for the first time in public.
  • usage: "The new ballet that debuts next months at Covent Garden, is already sold out"
• Make one's debut.
  • usage: "This young soprano debuts next month at the Metropolitan Opera"