nonrigid

adjective

non·​rig·​id ˌnän-ˈri-jəd 

: not rigid: such as

a

: flexible

a sheet of nonrigid plastic

b

: not having the outer shape maintained by a fixed framework : maintaining form by pressure of contained gas

A blimp is a nonrigid airship.

Word History

First Known Use

1874, in the meaning defined above