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