What does "freakish" mean?

Freakish: Apt to change the mind suddenly; whimsical; capricious. It may be a question whether the wife or the woman was the more freakish of the two. L'Estrange. Freakish when well, and fretful when she's sick. Pope. -- Freak"ish*ly, adv. -- Freak"ish*ness, n.