Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unidimensional is an adjective meaning "relating to a single dimension or aspect; having no depth or scope". It carries one recorded sense.
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”
“a novel with one-dimensional characters”
Definitions, synonyms and semantic relations for unidimensional come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.