Definition of "capricious"

I am heere with thee, and thy Goats, as the moſt capricious Poet honeſt Ouid was among Gothes.

c. 1598–1600 (date written), William Shakespeare, “As You Like It”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene iii], page 198

"Capricious?" And at this monsieur began to laugh. "Oh no, I'm not capricious. I am very faithful. I am very constant. Comprenez?"

1876–1877, Henry James, Jr., chapter I, in The American, Boston, Mass.: James R[ipley] Osgood and Company, […], published 5 May 1877, page 11