Definitions
1.NounA long outer garment worn over the shoulders covering the back; a cape, often with a hood.
2.NounA blanket-like covering, often metaphorical."Night hid her movements with its cloak of darkness."
3.NounThat which conceals; a disguise or pretext.
4.NounA text replacement for an IRC user's hostname or IP address, making the user less identifiable.
5.VerbTo cover as with or like a cloak.
6.VerbTo cover up, hide or conceal.
7.VerbTo render or become invisible via futuristic technology."The ship cloaked before entering the enemy sector of space."