From Longman Dictionary of Contemporary Englishrigorousrig‧or‧ous /ˈrɪɡərəs/ ●○○ adjective 1 CAREFULcareful, thorough, and exact a rigorous analysis of defence needs the rigorous standards required by the college2 STRICTvery severe or strict rigorous army training —rigorously adverb
Examples from the Corpus
rigorous• The entrance tests for people wishing to enter the diplomatic service are particularly rigorous.• rigorous academic standards• They use exposure to the world of work to motivate young people to learn more rigorous academics.• The car is put through rigorous road performance tests.• Every new drug has to pass a series of rigorous safety checks before it is put on sale.• Each distinctive type should be subject to a rigorous set of explicit rules of discipline.• It should be robust enough to stand up to the most rigorous testing from the appraisal panel.• His thinking is a little less rigorous than others, his language a little more colorful.• There are some rigorous theorems which prove that context free grammars can not be learned, in a certain sense.• Like all her writings, Children's Minds combines great clarity and lucidity of expression with original and rigorous thought. 