Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “rigorous”


adjective (CAREFUL)    /ˈrɪɡ.ər.əs/ US  /-ɚ-/ approving
careful to look at or consider every part of something to make certain it is correct or safe: rigorous testing/checking/methodsAccurate and exactCautious and vigilantPaying attention and being careful rigorously     /-li/ adverb
(Definition of rigorous adjective (CAREFUL) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of rigorous

More definitions for “rigorous”

Definitions of “rigorous” in other dictionaries

Word of the Day

limber up

to do gentle exercises to stretch the muscles in order to prepare the body for more active physical exercise

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More