1. sudden and unexpected; happening without warning
2. rudely brief in speech or manner
3. extremely steep or precipitous

Examples

• The meeting came to an abrupt end when the fire alarm sounded.
• His abrupt departure surprised everyone at the party.
• She gave an abrupt response and walked away.
• The teacher’s abrupt manner made students uncomfortable.
• The trail made an abrupt turn around the cliff.
• There was an abrupt drop in temperature overnight.
• The abrupt cliff face was impossible to climb.