Extra-

WordReference Random House Learner's Dictionary of American English © 2026

ex•tra /ˈɛkstrə/   adj., n., pl. -tras, adv. 
adj. 

1. [before a noun] beyond, more, or better than what is usual:
   Make an extra copy.
2. provided at an additional charge:
   [be + ~] Home delivery is extra.

n. 

3. an additional feature for which there is usually a charge:
   We ordered a few extras for the car.
4. a special edition of a newspaper:
   The "Daily News'' put out an extra to report the election results.

adv. 

5. in excess of, or beyond, the usual amount, size, or degree:
   extra large galoshes.

extra-, prefix. 

1. extra- comes from Latin, where it has the meaning "outside of;
   beyond'': extra- + galactic → extragalactic (= outside the galaxy);
   extra- + sensory → extrasensory (= beyond the senses).

WordReference Random House Unabridged Dictionary of American English © 2026

ex•tra  (ek′strə), adj. 

1. beyond or more than what is usual, expected, or necessary;
   additional:
   an extra copy of a newspaper; an extra charge.
2. larger or better than what is usual:
   an extra binding.

n. 

3. something extra or additional:
   the little amenities and extras that make life pleasant.
4. an additional expense.
5. a special edition of a newspaper, other than a regular edition.
6. something of superior quality.
7. Show Business [Motion Pictures, Television.] a person hired by the day to play a minor part, as a member of a mob or crowd.
8. an additional worker.
9. Sport Usually, extras. [Cricket.] a score or run not made from the bat, as a bye or a wide.

adv. 

10. in excess of the usual or specified amount:
    an extra high price.
11. beyond the ordinary degree;
    unusually;
    uncommonly:
    done extra well; extra large.

• by shortening of extraordinary 1770–80

extra-, 

1. a prefix meaning "outside,'' "beyond,'' freely used as an English formative:
   extrajudicial;
   extraterritorial;
   extra-atmospheric.

Also, extro-. 

• Latin, combining form of extrā (adverb, adverbial and preposition) outside (of ), without

Collins Concise English Dictionary © HarperCollins Publishers::

extra- prefix

1. outside or beyond an area or scope: extrasensory, extraterritorial

Etymology: from Latin extrā outside, beyond, changed from extera, from exterus outward