Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
4-dimensional is an adjective meaning "involving or relating to the fourth dimension or time". It carries one recorded sense.
involving or relating to the fourth dimension or time
Definitions, synonyms and semantic relations for 4-dimensional come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.