Definition of "extra"

extra

/ˈɛkstɹə/

adjective
not generally comparable, comparative more extra, superlative most extra
1. (not comparable) Beyond what is due, usual, expected, or necessary; extraneous; additional; supernumerary.
2. (not comparable, dated) Extraordinarily good; superior.
3. (comparable, slang) Over the top; going beyond what is normal or appropriate, often in a dramatic manner.
  Quotations
  I highly recommend getting some more bread on the side—they offer small loaves and soup crackers for free, but I'm so extra, I bought my own loaf.
  2017, Yael Livneh, "Whole Foods", in "Get The Inside Soup: Staffers Review Local Soup Stops", 3 February 2017, page 23
  Shattered glass, pierced, bejewelled, chromed and glittered - nails are going totally extra on Insta at the minute and we approve.
  2017 November, Claire Craig, “#Instabeauty”, in Northern Woman, page 48
  Two months of Christmas trees, Christmas movies and Christmas music brings so much fun to our home, we are so extra with it!
  2019, Michelle Spottswood, quoted in Kirby Myers, "Does Christmas in your house start before or after Thanksgiving", Key West Weekly, 21 November 2019, page 7
determiner
1. Denotes more.
adverb
not comparable
1. (informal) To an extraordinary degree.
noun
plural extras
1. Something additional, such as an item above and beyond the ordinary school curriculum, or added to the usual charge on a bill.
2. An extra edition of a newspaper, which is printed outside of the normal printing cycle, for example to report an important late-breaking event.
3. (cricket) A run scored without the ball having hit the striker's bat - a wide, bye, leg bye or no ball.
4. (acting) A supernumerary or walk-on in a film or play.
5. (slang) The state or trait of being over the top, of behaving in an overly dramatic manner.
6. Something of an extra quality or grade.