debut

(noun) the act of beginning something new. Synonyms: introduction, first appearance, launching, unveiling, entry. Example: "They looked forward to the debut of their new product line."

(noun) the presentation of a debutante in society.

(verb) present for the first time to the public. Example: "The band debuts a new song or two each month."

(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 month at the metropolitan opera."