Webster’s Revised Unabridged Dictionary · 1913
Frounce
Frounce (frouns), v. i. [imp. & p. p. Frounced; p. pr. & vb. n. Frouncing.] [OE. frouncen, fronsen, to told, wrinkle, OF. froncier, F. froncer, perh. fr. an assumed LL. frontiare to wrinkle the forehead, L. frons forehead. See Front, and cf. Flounce part of a dress.] To gather into or adorn with plaits, as a dress; to form wrinkles in or upon; to curl or frizzle, as the hair.
Not tricked and frounced, as she was wont. Milton.
Frounce, v. i. To form wrinkles in the forehead; to manifest displeasure; to frown. [Obs.]
The Commons frounced and stormed. Holland.
Frounce, n. 1. A wrinkle, plait, or curl; a flounce; — also, a frown. [Obs.] Beau. & Fl.
2. An affection in hawks, in which white spittle gathers about the hawk's bill. Booth.