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HYPHEN
WORDNET DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Adjective unidirectional has 1 sense

• unidirectional(a = adj.all) Array - operating or moving or allowing movement in one direction only; "a unidirectional flow"; "a unidirectional antenna"; "a unidirectional approach to a problem"
Antonym: bidirectional

OXFORD DICTIONARY

THESAURUS

unidirectional

direct, immediate, irreversible, monadal, monadic, one-piece, one-sided, one-way, straight, straightaway, straightforward, straightway, unbroken, undeviating, uniangulate, unibivalent, unibranchiate, unicameral, unicellular, unicuspid, unidentate, unidigitate, unidimensional, uniflorous, unifoliate, unifoliolate, unigenital, uniglobular, unilateral, unilinear, uniliteral, unilobed, unilobular, unimodular, unimolecular, uninterrupted, uniocular, unipart, unipartite, unipolar, univalent, univocal, unswerving

For further exploring for "unidirectional" in Webster Dictionary Online