cloak

n. loose sleeveless outer garment that fastens at the neck and hangs down the back; mask, disguise; something that covers, something which conceals

v. cover, conceal

A cloak is a type of loose garment that is worn over indoor clothing and serves the same purpose as an overcoat—it protects the wearer from the cold, rain or wind for example, or it may form part of a fashionable outfit or  uniform. Cloaks are as old as human history; there has nearly always been some form of long outer garment used to protect people from the weather. Over time cloaks have changed their look to match current styles and textile needs.
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Noun
1. anything that covers or conceals
(hypernym) covering
(derivation) dissemble, mask
2. a loose outer garment
(hypernym) overgarment, outer garment
(hyponym) burnous, burnoose, burnouse
Verb
1. hide under a false appearance; "He masked his disappointment"
(synonym) dissemble, mask
(hypernym) disguise

(v. t.)
To cover with, or as with, a cloak; hence, to hide or conceal.
  

(n.)
That which conceals; a disguise or pretext; an excuse; a fair pretense; a mask; a cover.
  

(n.)
A loose outer garment, extending from the neck downwards, and commonly without sleeves. It is longer than a cape, and is worn both by men and by women.
  

the cloak, glory, grandeur or power of the king