Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
say-so is a noun meaning "one chap's arbitrary assertion". It carries 3 recorded senses.
one chap's arbitrary assertion
an authoritative declaration
the power or right to give orders or make decisions
“he has the authority to issue warrants”
“deputies are given authorization to make arrests”
“a place of potency in the state”
Definitions, synonyms and semantic relations for say-so come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.