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
Unlike the predictable drawers that pull out, this style slides out to the side, so pulling out paper clips feels more like an event than a rudimentary task.
—Yelena Moroz Alpert, Architectural Digest, 30 June 2025
Rather than simply responding to instructions, the systems demonstrated initiative, persistence, and a rudimentary capacity for self-preservation.
—Hamilton Mann, Forbes.com, 29 June 2025
Chávez even lost in 2021 to Anderson Silva, the former UFC champion and rudimentary boxer who lost a one-sided ring decision to Paul one year later.
—Greg Beacham, Los Angeles Times, 29 June 2025
For me as a kid, that productivity was reading a book, producing a piece of, admittedly rudimentary, artwork, or going for a walk (i.e., exercising) with my dad.
—Elisabeth Sherman, Parents, 25 June 2025
See All Example Sentences for rudimentary
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Yelena Moroz Alpert, Architectural Digest, 30 June 2025
Rather than simply responding to instructions, the systems demonstrated initiative, persistence, and a rudimentary capacity for self-preservation.
—Hamilton Mann, Forbes.com, 29 June 2025
Chávez even lost in 2021 to Anderson Silva, the former UFC champion and rudimentary boxer who lost a one-sided ring decision to Paul one year later.
—Greg Beacham, Los Angeles Times, 29 June 2025
For me as a kid, that productivity was reading a book, producing a piece of, admittedly rudimentary, artwork, or going for a walk (i.e., exercising) with my dad.
—Elisabeth Sherman, Parents, 25 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 11 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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