Definition of bluff adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//blʌf//
; NAmE NAmE//blʌf//
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(of people or their manner) very direct and cheerful, with good intentions, although not always very polite Beneath his bluff exterior he was a sensitive man. Word Originadjective early 18th cent. (‘surly, abrupt in manner’): figurative use of bluff ‘steep cliff or slope’. The current positive connotation dates from the early 19th cent.
See the Oxford Advanced American Dictionary entry: bluff