say it: muhl-tee-MEE-dee-uh
multimedia is a noun meaning "transmission that combine media of communication (text and graphics and sound etc.)". It carries one recorded sense.
transmission that combine media of communication (text and graphics and sound etc.)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for multimedia come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.