- signify (v.)
- mid-13c., from Old French signifier (12c.), from Latin significare "to show by signs, mean, signify," from significus (adj.), from signum "sign" (see sign (n.)) + root of facere "to make" (see factitious). Intransitive sense of "to be of importance" is attested from 1660s. Meaning "engage in mock-hostile banter" is American English black slang first recorded 1932.
...'signifying,' which in Harlemese means making a series of oblique remarks apparently addressed to no one in particular, but unmistakable in intention in such a close-knit circle. ["Down Beat," March 7, 1968]