What is the meaning of Cloak?

A long outer garment worn over the shoulders covering the back; a cape, often with a hood.

A blanket-like covering, often metaphorical.

That which conceals; a disguise or pretext.

A text replacement for an IRC user's hostname or IP address, making the user less identifiable.

To cover as with or like a cloak.

To cover up, hide or conceal.

To render or become invisible via futuristic technology.

Source: wiktionary.org