1.Definition: designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure

2.Definition: fixed and unmoving

"A face rigid with pain"

Related Adjective(s):fixed, set

3.Definition: incapable of adapting or changing to meet circumstances

"A rigid disciplinarian"

Related Adjective(s):inflexible, unbending

4.Definition: incapable of compromise or flexibility

Related Adjective(s):strict

5.Definition: incapable of or resistant to bending

"A rigid strip of metal", "A table made of rigid plastic"

Related Adjective(s):stiff