Unable to bend or be forced out of shape; not flexible
sandwiches are best packed in a rigid container
Excessively rigid; too strict, inflexible, or uncompromising.
An object which undergoes no deformation; specifically one used as an idealized approximation of a real object, in which any two points are treated as remaining at a constant distance regardless of external forces acting upon it.
Stiff and solid, but not inflexible
Designating a boat consisting of a lightweight rigid hull, the top of which is ringed by a large inflatable tube.
A term that identifies the same object or individual in every possible world