[f. FOREST sb. + -FUL.] As much or as many as a forest will hold.
1832. Frasers Mag., IV. 745/1. Jack Reevess débonnaire mode of stipulating for four pounds of beef, a gallon of brandy, and a lioness per diem, was worth the roaring of a forest-full of shaggy monarchs.
1886. in Advance (Chicago), 30 Sept. The ladies wear whole forestfuls of birds on their bonnets.