Definition of "Debut" :

noun: the act of beginning something new

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

noun: the presentation of a debutante in society

verb: appear for the first time in public

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

verb: make one's debut

"This young soprano debuts next month at the Metropolitan Opera."

verb: present for the first time to the public

"The band debuts a new song or two each month."