Origin: Latin suffix -al
Unidirectional has 3 different meanings across 1 category:
A fabric in which the majority of fibers run in the same single direction.
operating or moving or allowing movement in one direction only
"a unidirectional flow"
"a unidirectional antenna"
"a unidirectional approach to a problem"
Pertaining to only one direction, e.g.: where all component parts are aligned in the same direction in space.