GRE TOEFL rigidity Definition The quality of being stiff, inflexible, or unyielding. Example "The rigidity of the rules made exceptions impossible." Sign in to save GRE Quiz → TOEFL Quiz → ← rigid rigor → Study tips featuring "rigidity" Write GRE Words Into Your Own Sentences TOEFL Academic Vocabulary: Study by Topic Related words GRE swill GRE taper GRE testy GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct