unidimensional has 1 distinct synonym spread across 1 of its 1 sense. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is multidimensional.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
relating to a single dimension or aspect; having no depth or scope
“a prose statement of fact is unidimensional, its value being measured wholly in terms of its truth”
Synonyms, antonyms and the broader and narrower relations for unidimensional come from Princeton University’s WordNet. Full sources and licences.