ETYM Of. cloque cloak (from the bell-like shape), bell, French cloche bell; perh. of Celtic origin and the same word as Eng. clock. Related to Clock.
1. A loose outer garment.
2. Anything that covers or conceals.
A one-piece enveloping garment worn on the shoulders, tied or clasped at the neck or chest, and reaching the knees or ankles. A cloak is generally longer than a cape, which is usually elbow- or hip-length. It often has slits cut into the front of the fabric for arms. Cloaks were popular during the late 19th century and again in the 1960s.

To cover with, or as with, a cloak; hence, to hide or conceal.