verb (Should we delete this sense?) To have a common expression; used in singular passive voice or plural active voice to indicate a rumor or well-known fact.
They say "when in Rome, do as the Romans do", which means "behave as those around you do."
verb Suppose, assume; used to mark an example, supposition or hypothesis.
A holiday somewhere warm – Florida, say – would be nice.
verb To speak; to express an opinion; to make answer; to reply.