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."