1. the quality of being bluff; frank, direct, and honest manner or speech, sometimes to the point of rudeness
Usage: uncountable; often used to describe a person's character or communication style
2. the quality of being steep or having a broad, flat front (of a cliff, headland, or similar geographical feature)
Usage: less common; chiefly descriptive of physical geography

Examples

• His bluffness in meetings sometimes offended colleagues, but everyone knew he meant well.
• She appreciated his bluffness; he never beat around the bush.
• The captain's bluffness made him a respected but not always popular leader.
• The bluffness of the coastal cliffs made them a striking landmark.
• Despite his bluffness, he was genuinely kind-hearted.
• Her bluffness could be mistaken for rudeness by those unfamiliar with her style.