Webster's Revised Unabridged Dictionary · 1913

Whimsey

Whimsey , noun

[See Whim.]

1.
A whim; a freak; a capricious notion, a fanciful or odd conceit.
The whimsies of poets and painters. — Ray
Men's folly, whimsies, and inconstancy. — Swift
Mistaking the whimseys of a feverish brain for the calm revelation of truth. — Bancroft
2.
(Mining) A whim.

Also: Whimsy

Whimsey , transitive verb

To fill with whimseys, or whims; to make fantastic; to craze. [Rare]
To have a man's brain whimsied with his wealth. — J. Fletcher