anything that covers or conceals
"The heavy fog acted as a cloak, hiding the distant mountains from view."
a loose outer garment
"She wrapped her shawl around herself like a cloak to keep warm against the chilly wind."
A long outer garment worn over the shoulders covering the back; a cape, often with a hood.
"She wrapped her red cloak tightly around herself as she walked through the chilly wind."
To cover as with a cloak.
"The heavy fog began to cloak the distant mountains in a thick, gray blanket."