rigid🔊

Stiff, rather than flexible. +

Fixed, rather than moving.

Rigorous and unbending.

Uncompromising.

(aviation) An airship whose shape is maintained solely by an internal and/or external rigid structural framework, without using internal gas pressure to stiffen the vehicle (the lifting gas is at atmospheric pressure); typically also equipped with multiple redundant gasbags, unlike other types of airship.

A bicycle with no suspension system.