Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
circumferent is an adjective meaning "closely encircling". It carries one recorded sense.
closely encircling
“encompassing mountain ranges”
“the surrounding countryside”
Definitions, synonyms and semantic relations for circumferent come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.