Adjective
1. incapable of or resistant to bending;
"a rigid strip of metal""a table made of rigid plastic""a palace guardsman stiff as a poker"2. incapable of compromise or flexibility
3. incapable of adapting or changing to meet circumstances;
"a rigid disciplinarian""an inflexible law""an unbending will to dominate"4. fixed and unmoving;
"with eyes set in a fixed glassy stare""his bearded face already has a set hollow look"- Connor Cruise O'Brien"a face rigid with pain"5. designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure