- 1[uncountable] the fact of being careful and paying great attention to detail academic/intellectual/scientific, etc. rigor
- 2 [uncountable] (formal) the fact of being strict or severe This crime must be treated with the full rigor of the law.
- 3 the rigors of something [plural] the difficulties and unpleasant conditions of something The plants were unable to withstand the rigors of a harsh winter. She woke refreshed to face the rigors of a new day.