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