verb

• (transitive) To remove a cloak or cover from; to deprive of a cloak or cover; to unmask; to reveal.
  "And will none have so much Charity, so much Zeal for publick Concern, as to uncloak this Impostour, and shew the dazled World what it is it thus bows to?"
• (intransitive) To remove one's cloak.
  "Nay, but my fireside's not the deck—I am mistress here; so let me uncloak thee." She seized his cloak, and, not without a slight resistance on his part, unclasped the collar, and threw it aside."
• (intransitive, science fiction) To become visible again by turning off a cloaking device.
  "Don't try to target the Klingons as they uncloak, you won't have time. Just use the phasers to make a nofly zone between us and the Takagi."