unidirectional /ˌjuː.nɪ.dɪˈɹɛk.ʃə.nəladjective 2noun 1forms 1 adjective2 •Pertaining to only one direction, e.g.: where all component parts are aligned in the same direction in space.[...] a reversible booster was fitted to the trailing bogie; all previous applications on the L.N.E.R. for use in main line traffic had been of unidirectional boosters, […] — 1941 •Not subject to change or reversal of direction. noun1 •A fabric in which the majority of fibers run in the same single direction. formsunidirectionals
