ground rule

1. 1.

   (baseball) a special rule (as in baseball) dealing with situations that arise due to the nature of the playing grounds

   Broaderrule

   baseball

Questions about ground rule

What does ground rule mean?

ground rule means "(baseball) a special rule (as in baseball) dealing with situations that arise due to the nature of the playing grounds".

Is ground rule a common word?

ground rule is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.