Antonyms of adj unidirectional

1 sense of unidirectional

Sense 1
unidirectional (vs. bidirectional) -- (operating or moving or allowing movement in one direction only; "a unidirectional flow"; "a unidirectional antenna"; "a unidirectional approach to a problem")

bidirectional (vs. unidirectional) -- (reactive or functioning or allowing movement in two usually opposite directions)
        => biface, bifacial -- (having two faces or fronts; "the Roman Janus is bifacial")
        => duplex -- (allowing communication in opposite directions simultaneously; "duplex system"; "duplex telephony")
        => two-way -- (operating or permitting operation in either of two opposite directions; "a two-way valve"; "two-way traffic"; "two-way streets")

Similarity of adj unidirectional

1 sense of unidirectional

Sense 1
unidirectional (vs. bidirectional) -- (operating or moving or allowing movement in one direction only; "a unidirectional flow"; "a unidirectional antenna"; "a unidirectional approach to a problem")
       => one-way -- (moving or permitting movement in one direction only; "one-way streets"; "a one-way ticket")
       => simplex -- (allowing communication in only one direction at a time, or in telegraphy allowing only one message over a line at a time; "simplex system")
       => unifacial -- (having but one principal or specialized surface; "a primitive unifacial flint tool")