rudimentary
adjective
ru·di·men·ta·ry
ˌrü-də-ˈmen-tə-rē 
-ˈmen-trē
1
: consisting in first principles : fundamental
had only a rudimentary formal education—
D. J. Boorstin
D. J. Boorstin2
: of a primitive kind
the equipment of these past empire-builders was rudimentary—A. J. Toynbee
A. J. Toynbee3
: very imperfectly developed or represented only by a vestige
the rudimentary tail of a hyrax
Examples of rudimentary in a Sentence
Because now, every schlemiel with a pair of mirrored sunglasses and a rudimentary grasp of the rules of poker thinks he can play cards with the pros.
—A. J. Jacobs, New York Times Book Review, 8 May 2005
Despite the rudimentary nature of its instruments—an octant, a chronometer and a level—the Lewis and Clark Expedition was a triumph for science and natural history.
—Daniel J. Boorstin, U.S. News & World Report, 11 July 1994
A few were hopeless imbeciles, unable to comprehend more than the rudimentary requirements of filling their bellies when food was placed before them …
—Edgar Rice Burroughs, The Monster Men, 1929
This class requires a rudimentary knowledge of human anatomy.
When baseball was in its rudimentary stages, different teams played by different rules.
Some insects have only rudimentary wings.
A. J. Jacobs, New York Times Book Review, 8 May 2005
Despite the rudimentary nature of its instruments—an octant, a chronometer and a level—the Lewis and Clark Expedition was a triumph for science and natural history.
—Daniel J. Boorstin, U.S. News & World Report, 11 July 1994
A few were hopeless imbeciles, unable to comprehend more than the rudimentary requirements of filling their bellies when food was placed before them …
—Edgar Rice Burroughs, The Monster Men, 1929
This class requires a rudimentary knowledge of human anatomy.
When baseball was in its rudimentary stages, different teams played by different rules.
Some insects have only rudimentary wings.
Recent Examples on the Web
What began as rudimentary chatbots programmed to respond to queries based on keywords eventually evolved into GenAI.
—Vivek Ahuja, Forbes.com, 11 July 2025
From behind the fence, at the white hut, a rudimentary but powerful loudhailer and speaker system is set up, from which a commentator fills every second of dead air with excitable exhortations to Allah combined with knowledgeable play-by-play analysis in machine-gun fast Arabic.
—Camilla Wright, semafor.com, 11 July 2025
The first cochlear implants were rudimentary, but feedback helped to improve them.
—Sushma Subramanian, Smithsonian Magazine, 2 July 2025
Iran could then package that material with high explosives, giving it a rudimentary bomb for testing purposes at the least.
—Richard Nephew, Foreign Affairs, 26 June 2025
See All Example Sentences for rudimentary
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Vivek Ahuja, Forbes.com, 11 July 2025
From behind the fence, at the white hut, a rudimentary but powerful loudhailer and speaker system is set up, from which a commentator fills every second of dead air with excitable exhortations to Allah combined with knowledgeable play-by-play analysis in machine-gun fast Arabic.
—Camilla Wright, semafor.com, 11 July 2025
The first cochlear implants were rudimentary, but feedback helped to improve them.
—Sushma Subramanian, Smithsonian Magazine, 2 July 2025
Iran could then package that material with high explosives, giving it a rudimentary bomb for testing purposes at the least.
—Richard Nephew, Foreign Affairs, 26 June 2025
See All Example Sentences for rudimentary
Cite this Entry
“Rudimentary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rudimentary. Accessed 21 Jul. 2025.
Copy CitationKids Definition
rudimentary
adjective
ru·di·men·ta·ry
ˌrüd-ə-ˈment-ə-rē
-ˈmen-trē
2
: very imperfectly developed or represented only by a small part compared to the fully developed form
a rudimentary tail
Medical Definition
rudimentary
adjective
ru·di·men·ta·ry
ˌrüd-ə-ˈment-ə-rē, -ˈmen-trē
: very imperfectly developed or represented only by a vestige
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