Definition of "comeback"

comeback

/ˈkʌmbæk/

noun
plural comebacks
1. A return (e.g. to popularity, success, etc.) after an extended period of obscurity or underperformance.
  Quotations
  According to rumors in the entertainment world on December 6, Girls' Generation will be making a comeback next year with a masculine concept. They have supposedly decided on the title song in their new album and have begun filming the music video on December 6. It appears they have started preparing for a full-scale comeback! It will be the girls' first Korean comeback in a year since "I Got a Boy."
  2013 December 6, alim17, “Girls' Generation rumored to make a comeback in early 2014!”, in allkpop.com‎
2. A retort or answer, particularly a quick or clever one.
3. (sports) An occurrence of an athlete or sports team in a competition overcoming a substantial disadvantage in points to win or draw.
  Quotations
  Newcastle produced a stunning comeback from 4-0 down to earn a draw that shocked title hopefuls Arsenal.
  2011 February 5, Paul Fletcher, “Newcastle 4 - 4 Arsenal”, in BBC‎
verb
1. Misspelling of come back.