Definitions
1.nounSomething additional, such as an item above and beyond the ordinary school curriculum, or added to the usual charge on a bill.
2.nounAn extra edition of a newspaper, which is printed outside of the normal printing cycle."Extra, extra! Read all about it!"
3.nounA run scored without the ball having hit the striker's bat - a wide, bye, leg bye or no ball.
4.nounA supernumerary or walk-on in a film or play.
5.nounSomething of an extra quality or grade.