ground rule double

noun

, Baseball.

1. a safe hit ruled for two bases according to the rules of a particular stadium, as when a fly ball bounces once in the outfield and then clears a fence.

Word History and Origins

Origin of ground rule double¹

An Americanism dating back to 1945–50

Example Sentences

On that basis, I'd call the Post piece at least a ground-rule double.

From The Daily Beast