unidirectional

Definitions of unidirectional

1. adjective

   operating or moving or allowing movement in one direction only
   “a unidirectional flow”

   “a unidirectional antenna”

   “a unidirectional approach to a problem”

   synonyms:

   one-way

   moving or permitting movement in one direction only

   simplex

   allowing communication in only one direction at a time, or in telegraphy allowing only one message over a line at a time

   unifacial

   having but one principal or specialized surface

   antonyms:

   bidirectional

   reactive or functioning or allowing movement in two usually opposite directions

   biface, bifacial

   having two faces or fronts

   duplex

   allowing communication in opposite directions simultaneously

   two-way

   operating or permitting operation in either of two opposite directions