(MORE) [adjective], [adverb] [not gradable], [noun] - (something) added, additional or moreI'll need some extra help/clothes/time/money.Recently he's been working an extra two hours a day.We agreed on a price but afterwards they wanted £10 extra (= more).The price includes travel and accommodation but meals are extra (= there is an additional charge for meals).They pay her extra to work nights.In her new job she has to work extra long days.He helped us so much we gave him a (little) bit extra (= gave more, esp. money, than expected or agreed).Seat belts are included as standard but electric windows are an (optional) extra.In a film, extras are people who do not have speaking parts and who are usually part of the background, for example, in a crowd.In cricket, an extra is a point given to one team if the other team makes an illegal mistake (when bowling).In a game of football (UK and ANZ) extra time (US overtime) is the period of time in which play continues if neither team has won in the usual time allowed for the game.
EXTRA
Meaning of EXTRA in English
Cambridge English vocab. Кембриджский английский словарь. 2012