rigid, rigorous, strict, stringent mean extremely severe or stern. rigid implies uncompromising inflexibility.

rigid adjective (STIFF) not able to be bent: rigid plastic (Definition of rigid from the Cambridge Academic Content Dictionary © Cambridge University Press)

RIGID definition: stiff or unyielding; not pliant or flexible; hard. See examples of rigid used in a sentence.

A rigid substance or object is stiff and does not bend, stretch, or twist easily. ...rigid plastic containers. These plates are fairly rigid.

Definition of rigid adjective from the Oxford Advanced Learner's Dictionary. (often disapproving) (of rules, methods, etc.) very strict and difficult to change synonym inflexible. The curriculum was too …

1. not bending; physically inflexible or stiff: a rigid piece of plastic. 2. unbending; rigorously strict; severe: rigid rules.

Dec 24, 2025 · rigid (comparative rigider or more rigid, superlative rigidest or most rigid) Stiff, rather than flexible. synonyms, antonyms Synonyms: inflexible; see also Thesaurus ...

• A honeycomb provides the most rigid structure with lightest weight. • The framework of the aircraft must be rigid yet light. • The key to success is flexibility. If you're too rigid, you could be in trouble. …

rig•id (rij′ id), adj. stiff or unyielding; not pliant or flexible; hard: a rigid strip of metal. firmly fixed or set. inflexible, strict, or severe: a rigid disciplinarian; rigid rules of social behavior. exacting; thorough; …

The patient's legs were rigid. The periodical has rigid [= strict, inflexible] guidelines for submissions. He is a rigid disciplinarian. The law was rigidly enforced. The soldiers stood rigidly at attention.