Dictionary.com
Thesaurus.com

ground rule double

American  

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.


Etymology

Origin of ground rule double

An Americanism dating back to 1945–50

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But instead of allowing Straw and Barger to score, the play was ruled to be a ground rule double,, external putting the runners on second and third.

From BBC

A ground rule double is typically signalled when a ball hit fair is deemed to be impossible to field in the layout of a particular stadium, such as when it becomes trapped under a tarpaulin, and runners are allowed to advance by two bases.

From BBC

Despite a home run from outfielder Randal Grichuk and a ninth-inning RBI ground rule double from Brandon Drury, the Angels fell to the Seattle Mariners 3-2 on Saturday night for their fifth consecutive loss.

From Los Angeles Times

The Mets unsuccessfully appealed and Nimmo was credited with a ground rule double.

From Seattle Times

After Smyly left in the eighth, Manuel Rodríguez gave up Evan Longoria’s bases-loaded ground rule double to kill a shutout bid.

From Seattle Times