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Definitions

rudimentary

[roo-duh-men-tuh-ree, -tree] / ˌru dəˈmɛn tə ri, -tri /
ADJECTIVE
basic, fundamental
Synonyms
STRONGEST
elemental elementary embryonic primitive simple
WEAK
abecedarian basal beginning early immature initial introductory larval nuts-and-bolts primary simplest uncompleted undeveloped vestigial
Antonyms
STRONGEST
complex complicated difficult intricate sophisticated
WEAK
additional advanced derivative developed extra nonessential

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Anyone with even rudimentary knowledge of recent history would have known this was likely.

From Salon • Mar. 15, 2026

As it hit the pitch, Catan leapt into action and started performing rudimentary CPR, pumping the bird's ribcage.

From Barron's • Feb. 26, 2026

While rudimentary, the Odyssey broke a barrier in the world of television.

From The Wall Street Journal • Jan. 22, 2026

"I just took a very rudimentary, basic kit with me," he says.

From BBC • Jan. 19, 2026

Quite the contrary: some of his most famous papers are marred by rudimentary mathematical errors, occasionally leading to erroneous conclusions.

From "Big Science" by Michael Hiltzik