Scrabble is a word game in which two to four players score points by placing tiles, each bearing a single letter, onto a gameboard which is divided into a 15×15 grid of squares. The tiles must form words which, in crossword fashion, flow left to right in rows or downwards in columns. The words must be defined in a standard dictionary, or present in specified reference works (e.g., the Official Tournament and Club Word List, the Official Scrabble Players Dictionary), which provide a list of officially permissible words.
The name Scrabble is a trademark of Hasbro, Inc. in the United States and Canada and has been sold by Hasbro’s Parker Brothers division since 1999. Prior to 1999, it was sold as a Milton Bradley game. Outside the United States and Canada, Scrabble is a trademark of Mattel. The game is sold in 121 countries and is available in 29 languages; approximately 150 million sets have been sold worldwide and roughly one-third of American and half of British homes have a Scrabble set. There are around 4,000 Scrabble clubs around the world.