Definitions
1.nounNegative effects, such as headache or nausea, caused by previous drunkenness due to (excessive) consumption of alcohol."I really enjoyed yesterday’s party, but now I have the biggest hangover – I’ll not be doing that again any time soon."
2.nounSimilar negative effects caused by previous excessive consumption of something else, such as a drug, coffee, sugar, etc.
3.nounAn unpleasant relic left from prior events.
4.nounA sleeping arrangement, usually in homeless shelters, over a rope.