NOTE: This is a metaphorical extension of sense 2.
He cloaked his disappointment.
She cloaked the insult in euphemisms.
Publicists cloaked his error.
WordNet 3.0 Sense Numbers: 1
Trees cloaked the mountain.
The monks cloaked themselves.
We cloaked the walls with fabric panels.
WordNet 3.0 Sense Numbers: 2, 3