c.1300, "to blossom, grow," from O.Fr. floriss-, stem of florir, from L. florere "to bloom, blossom, flower," from flos "a flower" (see flora). Metaphoric sense of "thrive" is mid-14c. Meaning "to brandish (a weapon)" first attested late 14c. Related: Flourished; flourishing. The noun meaning "literary or rhetorical embellishment" is from c.1600.