Obs. rare1. [as if f. L. *fatuōsus, f. fatuus FATUOUS + -ITY.] = FATUITY.
1681. Glanvill, Sadducismus, I. 90. Which Opinion, tho, at the very Sight, it appears very ridiculous, yet it is stiffly held by the Maintainers of it, and that not without some Fatuosity and Superciliousness.