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WordReference Random House Learner's Dictionary of American English © 2024rig•or•ous /ˈrɪgərəs/USA pronunciation adj. - of or relating to rigor:rigorous exercise; rigorous research.
WordReference Random House Unabridged Dictionary of American English © 2024rig•or•ous (rig′ər əs),USA pronunciation adj. - characterized by rigor;
rigidly severe or harsh, as people, rules, or discipline:rigorous laws. - severely exact or accurate;
precise:rigorous research. - (of weather or climate) uncomfortably severe or harsh;
extremely inclement. - Mathematics, Philosophy[Logic, Math.]logically valid.
- Medieval Latin rigōrōsus. See rigor, -ous
- Middle English 1350–1400
- 1.See corresponding entry in Unabridged stern, austere, hard, inflexible, stiff, unyielding. See strict.
- 2.See corresponding entry in Unabridged demanding, finical.
- 3.See corresponding entry in Unabridged hard, bitter.
- 1.See corresponding entry in Unabridged flexible, soft.
- 2.See corresponding entry in Unabridged inaccurate.
- 3.See corresponding entry in Unabridged mild.
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