1. lacking sensitivity in dealing with others; saying or doing things that are likely to upset or offend people

Examples

• It was tactless of him to mention her weight loss at the party.
• The tactless comment about their divorce made everyone uncomfortable.
• She realized her tactless question had hurt his feelings.
• His tactless behavior at the meeting offended several colleagues.
• The tactless remark about their financial troubles was inappropriate.
• It would be tactless to bring up the failed project during his promotion ceremony.