say-so

[sey-soh]

noun

plural

say-sos 

1. one's personal statement or assertion.

2. final authority; directing influence.

3. an authoritative statement.

say-so

noun

1. an arbitrary assertion

2. an authoritative decision

3. the authority to make a final decision

Word History and Origins

Origin of say-so¹

First recorded in 1630–40; originally, one's mere word on a matter, as opposed to proof