- having, moving in, or operating in only one direction
WordReference Random House Unabridged Dictionary of American English © 2026
u•ni•di•rec•tion•al
(yo̅o̅′ni di rek′shə nl, -dī-),USA pronunciation adj.
- operating or moving in one direction only;
not changing direction:a unidirectional flow.
- uni- + directional 1880–85
Collins Concise English Dictionary © HarperCollins Publishers::
unidirectional /ˌjuːnɪdɪˈrɛkʃənəl; -daɪ-/ adj
'unidirectional' also found in these entries (note: many are not synonyms or translations):