Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
dining-room is a noun meaning "a room used for dining". It carries one recorded sense.
a room used for dining
Definitions, synonyms and semantic relations for dining-room come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.