1. rude or disrespectful, especially to someone in authority
2. not relevant or appropriate to a particular matter
Usage: formal

Examples

• The student’s impertinent remarks to the teacher earned him detention.
• She found his impertinent questions about her personal life annoying.
• It would be impertinent of me to comment on their family matters.
• The lawyer objected that the witness’s testimony was impertinent to the case.
• His impertinent behavior during the meeting shocked everyone.
• The judge ruled that such impertinent details should be excluded from evidence.