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