Fa, the fourth note in the gamut: ut, re, sol, la, mi, fa, LLL IV, 2, 102. C fa ut, Shr. III, 1, 76. fa, sol, la, mi, Lr. I, 2, 149. Used as a verb: I'll try how you can sol, fa, Shr. I, 2, 17. I'll re you, I'll fa you, Rom. IV, 5, 121.