• synonyms


[roo-duh-men-tuh-ree, -tree]
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  1. pertaining to rudiments or first principles; elementary: a rudimentary knowledge of geometry.
  2. of the nature of a rudiment; undeveloped or vestigial.
  3. primitive.
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Often ru·di·men·tal [roo-duh-men-tl] /ˌru dəˈmɛn tl/.

Origin of rudimentary

First recorded in 1830–40; rudiment + -ary
Related formsru·di·men·ta·ri·ly [roo-duh-men-tair-uh-lee, -men-ter-uh-lee] /ˌru də mɛnˈtɛər ə li, -ˈmɛn tər ə li/, adverbru·di·men·ta·ri·ness, nounnon·ru·di·men·tal, adjectivenon·ru·di·men·ta·ri·ly, adverbnon·ru·di·men·ta·ri·lyness, nounnon·ru·di·men·ta·ry, adjective

Synonyms for rudimentary

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1. fundamental, initial. See elementary. 2. embryonic.

Antonyms for rudimentary

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for rudimentary

simple, elementary, primitive, embryonic, elemental, abecedarian, basal, beginning, early, immature, initial, introductory, primary, undeveloped, larval, simplest, uncompleted, vestigial

Examples from the Web for rudimentary

Contemporary Examples of rudimentary

Historical Examples of rudimentary

British Dictionary definitions for rudimentary


less commonly rudimental

  1. basic; fundamental; not elaborated or perfected
  2. incompletely developed; vestigialrudimentary leaves
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Derived Formsrudimentarily or rare rudimentally, adverb
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 rudimentary


1827; see rudiment + -ary. Earlier was rudimental (1590s).

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Online Etymology Dictionary, © 2010 Douglas Harper

rudimentary in Medicine


(rōō′də-mĕntə-rē, -mĕntrē)
  1. Being imperfectly or incompletely developed; embryonic.
  2. Being in the earliest stages of development; incipient.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.