Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
signally is an adverb meaning "as a signal". It carries 2 recorded senses.
as a signal
“a term that is used signally rather than symbolically”
Definitions, synonyms and semantic relations for signally come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.