incapable of or resistant to bending; "a rigid strip of metal"; "a table made of rigid plastic"; "a palace guardsman stiff as a poker" designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure incapable of compromise or flexibility
disapproval Laws, rules, or systems that are rigid cannot be changed or varied, and are therefore considered to be rather severe. Several colleges in our study have rigid rules about student conduct flexible + rigidity ri·gid·ity the rigidity of government policy. + rigidly rig·id·ly The caste system was rigidly enforced