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