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

A blanket-like covering, often metaphorical.

(figurative) That which conceals; a disguise or pretext.

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

(transitive) To cover as with or like a cloak.

(transitive, figurative) To cover up, hide or conceal.

(science fiction, transitive, intransitive) To render or become invisible via futuristic technology.