from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Sports A rule governing the playing of a game on a particular field, course, or court.
  • noun A basic rule of procedure or behavior.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun sports A rule regarding play on a specific field, course, or court.
  • noun idiomatic, usually plural The basic rules or standards; whatever someone must know before proceeding.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

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


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