Definition of rigid adjective from the Oxford Advanced Learner's Dictionary

      

    rigid

     adjective
    adjective
    BrE BrE//ˈrɪdʒɪd//
     
    ; NAmE NAmE//ˈrɪdʒɪd//
     
    Materials and properties
     
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  1. 1(often disapproving) (of rules, methods, etc.) very strict and difficult to change synonym inflexible The curriculum was too narrow and too rigid. His rigid adherence to the rules made him unpopular.
  2. 2(of a person) not willing to change their ideas or behaviour synonym inflexible rigid attitudes
  3. 3(of an object or substance) stiff and difficult to move or bend a rigid support for the tent She sat upright, her body rigid with fear. (figurative) I was bored rigid (= extremely bored). See related entries: Materials and properties
  4. Word Origin late Middle English: from Latin rigidus, from rigere ‘be stiff’.Extra examples He grew even more rigid and uncompromising as he got older. He went absolutely rigid with shock. She feigned sleep, lying rigid in bed. We operate within fairly rigid parameters. Her rigid ideas and stern manner had frightened the children. His body suddenly went rigid with fear. Sandwiches are best packed in a rigid container. The church continues to have a rigid hierarchy. The material is rigid and brittle. The warriors were governed by a rigid code of ethics.
See the Oxford Advanced American Dictionary entry: rigid