Definition of "thrap" [thrap]

• Nautical, to bind on; fasten about: same as frap, 2.

The Century Dictionary (Public Domain)

• "Before she could sit down with the paper and grease pencil, there wasa thrap on the door."
• "At the thrap on the door to the guest quarters, Secca sat up straighter in the armchair pulled up before the conference table."
• "It is late afternoon before there is a thrap on the door, although at times Lorn has heard voices, often intense, if whispered, as though Lorn might have been listening."