1. showing bad manners; impolite or discourteous
2. roughly made or done; lacking refinement or skill
3. sudden and unpleasant; abrupt

Examples

• It was rude of him to interrupt during the presentation.
• The waiter was surprisingly rude to the customers.
• She built a rude shelter from branches and leaves.
• The rude awakening came when the alarm clock rang at 5 AM.
• His rude manners embarrassed everyone at the dinner party.
• The cabin was just a rude structure with no electricity.
• We received a rude shock when we saw the bill.