1. the quality of being sudden and unexpected
2. the quality of being rude or unfriendly in speech or manner
3. the quality of being steep or sharply angled

Examples

• The abruptness of his departure surprised everyone at the meeting.
• She was taken aback by the abruptness of his response to her question.
• The abruptness of the cliff made climbing dangerous.
• His abruptness in conversation often offended his colleagues.
• The weather changed with startling abruptness from sunny to stormy.
• The abruptness of the mountain trail challenged even experienced hikers.
• Her abruptness when answering the phone suggested she was busy.