4. Abrupt; roughly frank; unceremonious; blunt; brusque; as, a bluff answer; a bluff manner of talking; a bluff sea captain. "Bluff King Hal." Sir W. Scott.
There is indeed a bluff pertinacity which is a proper defense in a moment of surprise.
I. Taylor.
Bluff, n. 1. A high, steep bank, as by a river or the sea, or beside a ravine or plain; a cliff with a broad face.
Beach, bluff, and wave, adieu.
Whittier.
2. An act of bluffing; an expression of self- confidence for the purpose of intimidation; braggadocio; as, that is only bluff, or a bluff.