/ ˈekstrə; NAmE / adjective , noun , adverb
■ 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.
—see also extra time
■ noun
1.
a thing that is added to sth that is not usual, standard or necessary and that costs more :
The monthly fee is fixed and there are no hidden extras (= unexpected costs) .
( BrE )
Metallic paint is an optional extra (= a thing you can choose to have or not, but must pay more for if you have it) .
2.
a person who is employed to play a very small part in a film / movie, usually as a member of a crowd
■ adverb
1.
in addition; more than is usual, expected or exists already :
to charge / pay / cost extra
I need to earn a bit extra this month.
The rate for a room is £30, but breakfast is extra.
2.
(with an adjective or adverb) more than usually :
You need to be extra careful not to make any mistakes.
an extra large T-shirt
She tried extra hard.
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WORD ORIGIN
mid 17th cent. (as an adjective): probably a shortening of extraordinary , suggested by similar forms in French and German .