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See more synonyms for intra- on Thesaurus.com
  1. a prefix meaning “within,” used in the formation of compound words: intramural.
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Compare intro-.

Origin of intra-

< Late Latin intrā-, representing Latin intrā (adv. and preposition); akin to interior, inter-
Can be confusedinter- intra-

ab intra

[ahb in-trah; English ab in-truh]
adverb Latin.
  1. from inside; from within.
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intra muros

[in-trah moo-rohs; English in-truh myoo r-ohs]
adverb Latin.
  1. within the walls, as of a city.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for intra

then, afterwards, eventually, thereafter, later, soon, next, late, subsequently, after, behind, ultimately, latterly, ensuingly, intra, thereon

Examples from the Web for intra

Historical Examples of intra

  • A boat was leaving for Intra, so he went on board, and at Intra took the train for Milan.

    The Devourers

    Annie Vivanti Chartres

  • But Sophy said that she had ordered a carrozzella to go shopping in Intra for Bobby.

    Shadows of Flames

    Amelie Rives

  • At three she went upstairs to change her tea-gown for the drive to Intra.

    Shadows of Flames

    Amelie Rives

  • Intra quatuor decim dies, commodatum ni redderis, neque belle custodieris, alio tempore dominus: Non habeo dicet.

    French Book-plates

    Walter Hamilton

  • Quando vis exprimere quia brevis est, primis labris sonat; quando exprimis longam, intra palatum sonat.

British Dictionary definitions for intra


  1. within; insideintravenous
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Word Origin for intra-

from Latin intrā on the inside, within; see interior
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for intra


word-forming element meaning "within, inside, on the inside," from Latin intra "on the inside, within," related to inter "between," from PIE *en-t(e)ro-, from root *en "in" (see in). Commonly opposed to extra-, but the use of intra as a prefix was rare in classical Latin.

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Online Etymology Dictionary, © 2010 Douglas Harper

intra in Medicine


  1. Within:intramedullary.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

intra in Science


  1. A prefix meaning “inside” or “within,” as in intravenous, within a vein.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.