Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • Outside; beyond: extraterritorial.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • outside, beyond.

from the GNU version of the Collaborative International Dictionary of English

  • A Latin preposition, denoting beyond, outside of; -- often used in composition as a prefix signifying outside of, beyond, besides, or in addition to what is denoted by the word to which it is prefixed.

Etymologies

Latin extrā-, from extrā; see eghs in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin extra ("outside, except, beyond") (adverb and preposition), from exter ("being on the outside"). (Wiktionary)

Examples

  • The worst thing about this ongoing kerfuffle over superinjunctions is that it keeps forcing me to contemplate the extra- curricular activity of men who kick balls around lawns for a living.

    Charlie Brooker: Why idolise footballers? It's like living in a world where half of us worship shire horses

  • Follow extra- with a hyphen when it is part of a compound modifier describing a condition beyond the usual size, extent or degree:

    Essential Guide to Business Style and Usage

  • Do not use a hyphen when extra- means outside of unless the prefix is followed by a word beginning with a or a capitalized word:

    Essential Guide to Business Style and Usage

  • Mr. Morgan was farther away than the cabin, but Charlie had made his length of rope extra-long.

    CABIN IN THE SNOW

  • Marseille Fos, Europe's fifth-biggest port and the world's third-largest crude oil terminal, will begin operating extra- long 850-meter container trains to Valenton in the suburbs of Paris next year.

    BusinessWeek.com -- Top News

  • Wang made $382,519 in 2010, including overtime and extra- duty compensation.

    BusinessWeek.com -- Top News

  • Most of them here come with Korean and you have to buy -pay extra- Windows in English.

    Crooks and Liars

  • Valerio Mezzanotti for The New York Times From left: CÉLINE, an asymmetrical wool coat over a turtleneck and slim two-tone trousers; YOHJI YAMAMOTO, an asymmetrical dress in wool flannel, the back sheer to the waist; HAIDER ACKERMANN, a cutaway satin jacket and extra- wide belt over tapered satin pants.

    NYT > Home Page

  • But while cheerleading is embedded in the US curriculum, it's only slowly making an impact in the UK, with over a third of British schools currently offering the activity as an extra- curricular part of the PE syllabus.

    Evening Standard - Home

  • Super-injunctions bar U.K. media from writing about extra- marital affairs or identifying celebrities involved.

    BusinessWeek.com -- Top News

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