Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
furthermost is an adjective meaning "(comparatives of `far') most remote in space or time or order". It carries one recorded sense.
comparative
Definitions, synonyms and semantic relations for furthermost come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.