Definitions of debut:

• noun:   the presentation of a debutante in society
• noun:   the act of beginning something new

  Example: "They looked forward to the debut of their new product line"

• verb:   appear for the first time in public

  Example: "The new ballet that debuts next months at Covent Garden, is already sold out"

• verb:   make one's debut

  Example: "This young soprano debuts next months at the Metropolitan Opera"

• verb:   present for the first time to the public

  Example: "The and debuts a new song or two each month"