Noun: ground rule grawnd rool
- (baseball) a special rule (as in baseball) dealing with situations that arise due to the nature of the playing grounds
"The ground rule stated that any ball hit into the ivy-covered outfield wall would be a double"
- A basic principle or rule
"One of the ground rules for the debate was that each candidate would have two minutes to respond"
Derived forms: ground rules
Type of: rule