Simple Definition of ground rule
: a basic rule about what should be done in a particular situation, event, etc.
sports : a special rule about how a game is played on a particular field, court, or course
Full Definition of ground rule
1 : a sports rule adopted to modify play on a particular field, court, or course
2 : a rule of procedure <ground rules for selecting a superintendent — American School Board Journal>
Examples of ground rule in a sentence
<before the debate begins, let's lay out some ground rules>
First Known Use of ground rule
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Thesaurus: All synonyms and antonyms for "ground rule"
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