rigidity Get Printable Handwriting (ri-gid-i-ty) 4 syllables Learn It! Spelling Test Definition noun. 1 the physical property of being stiff and resisting bending; 2 the quality of being rigid and rigorously severe Example Sentence She suffered from muscular rigidity and tremors. Synonyms stiff; firm; inflexible Antonyms bendable; flexible Share with your friends: