Definition of "gonna"

gonna

/ɡən.ə/

verb
1. (colloquial, with bare infinitive) Contraction of going to when followed by an infinitive verb: used to express a future action.
  Quotations
  Well, you ain't got much longer to laugh. I'm coming, and I'm gonna put one in your dirty hide for every lying crack that you made about me, see?
  1931, Mervyn LeRoy, Little Caesar
  Never gonna give you up, / Never gonna let you down, / Never gonna run around and desert you. / Never gonna make you cry, / Never gonna say goodbye, / Never gonna tell a lie and hurt you.
  1987, Stock Aitken Waterman (lyrics and music), “Never Gonna Give You Up”, in Whenever You Need Somebody, performed by Rick Astley, RCA Records