Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
slumbery is an adjective meaning "inclined to or marked by drowsiness". It carries one recorded sense.
inclined to or marked by drowsiness
“slumberous (or slumbrous) eyes”
“`slumbery' is archaic”
“the sound had a somnolent effect”
Definitions, synonyms and semantic relations for slumbery come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.