Oxford Essential Dictionary
extra
adjective, adverb
more than what is usual:
I've put an extra blanket on your bed because it's cold tonight.
The room costs £30 and you have to pay extra for breakfast.
Longman Dictionary of Contemporary English
extra
I. ex‧tra1 S1 W2 /ˈekstrə/ BrE AmE adjective
[Date: 1600-1700; Origin: Probably from extraordinary]
1. [only before noun] more of something, in addition to the usual or standard amount or number:
Could you get an extra loaf of bread?
Allow extra time for your journey.
Drivers are advised to take extra care.
Residents can use the gym at no extra cost.
an extra ten minutes/three metres etc
I asked for an extra two weeks to finish the work.
2. [not before noun] if something is extra, it is not included in the price of something and you have to pay more for it OPP included:
Dinner costs $15 but wine is extra.
• • •
THESAURUS
▪ extra in addition to the usual or standard cost, time, amount etc: They let the kids stay up an extra hour. | Some stores charge extra for delivery. | Postage is extra.
▪ additional [only before noun] more than the basic amount or the amount that you expected or agreed. Additional is more formal than extra: An evening job would provide additional income. | There may be an additonal charge for paying bills by credit card.
▪ added [only before noun ] extra – used when talking about something that makes something better or more effective: an added benefit | an added precaution | It was a beautiful place, and the good weather was an added bonus. | Use a sunscreen for added protection.
▪ spare [only before noun] kept in addition to the one you usually use, so that it is available if the one you usually use breaks, gets lost etc: a spare key | a spare tyre | a spare set of clothes
Oxford Advanced Learner's Dictionary
extra
extra [extra extras] adjective, noun, adverb [ˈekstrə] [ˈekstrə]
adjective
more than is usual, expected, or than exists already
Syn: additional
• Breakfast is provided at no extra charge.
• The conference is going to be a lot of extra work.
• an extra pint of milk
• The government has promised an extra £1 billion for health care.
• Take extra care on the roads this evening.
• The play is to run for an extra week!
• extra help for single parents
see also extra time
Word Origin:
mid 17th cent. (as an adjective): probably a shortening of extraordinary, suggested by similar forms in French and German.
Cambridge Advanced Learner's Dictionary
Cambridge Advanced Learner's Dictionary - 4th Edition
extra / ˈek.strə / adjective
A2 added to what is normal:
If you need any extra help, just call me.
Recently he's been working an extra two hours a day.
The price includes travel and accommodation but meals are extra (= there is an additional charge for meals) .
© Cambridge University Press 2013
Collins Advanced Learner’s English Dictionary
extra
/ekstrə/
(extras)
Frequency: The word is one of the 1500 most common words in English.
1.
You use extra to describe an amount, person, or thing that is added to others of the same kind, or that can be added to others of the same kind.
Police warned motorists to allow extra time to get to work...
Extra staff have been taken on to cover busy periods...
There’s an extra blanket in the bottom drawer of the cupboard.
= additional
ADJ: ADJ n
2.
If something is extra, you have to pay more money for it in addition to what you are already paying for something.
The price of your meal is extra.
ADJ: v-link ADJ
•
Extra is also a pronoun.
Many of the additional features now cost extra...
PRON
•
Extra is also an adverb.
You may be charged 10% extra for this service.
ADV
3.
Extras are additional amounts of money that are added to the price that you have to pay for something.
There are no hidden extras.
N-COUNT: usu pl
4.
Extras are things which are not necessary in a situation, activity, or object, but which make it more comfortable, useful, or enjoyable.
Optional extras include cooking tuition at a top restaurant...
N-COUNT: usu pl
5.
The extras in a film are the people who play unimportant parts, for example as members of a crowd.
N-COUNT
6.
You can use extra in front of adjectives and adverbs to emphasize the quality that they are describing. (INFORMAL)
I’d have to be extra careful...
What makes a magnificent garden extra special?...
= especially
ADV: ADV adj/adv [emphasis]
Merriam-Webster's Advanced Learner's Dictionary
extra-
extra- prefix : outside or beyond
• an extramarital affair
- opposite intra-