rigid rigid /ˈrɪdʒɪd/

adjective

1. () Incapable of or resistant to bending  ( stiff , rigid )
   incapable of or resistant to bending
    A rigid strip of metal
   a rigid strip of metal
    A table made of rigid plastic
   a table made of rigid plastic
    A palace guardsman stiff as a poker
   a palace guardsman stiff as a poker
    Stiff hair
   stiff hair
    A stiff neck
   a stiff neck
   
2. () Incapable of adapting or changing to meet circumstances  ( inflexible , unbending , rigid )
   incapable of adapting or changing to meet circumstances
    A rigid disciplinarian
   a rigid disciplinarian
    An inflexible law
   an inflexible law
    An unbending will to dominate
   an unbending will to dominate
   
3. () Incapable of compromise or flexibility  ( strict , rigid )
   incapable of compromise or flexibility
   
4. (aeronautics) designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure  ( rigid )
   (aeronautics) designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure
   
5. Fixed and unmoving  ( rigid , set , fixed )
   fixed and unmoving
    With eyes set in a fixed glassy stare
   with eyes set in a fixed glassy stare
    His bearded face already has a set hollow look
   his bearded face already has a set hollow look
    A face rigid with pain
   a face rigid with pain