Noun

The playing of a game or games, including but not limited to video games and games of chance.

* (Philip Schaff)

*{{quote-magazine, date=2013-06-28, author=(Tom Vanderbilt)

, volume=189, issue=3, page=29, magazine=(The Guardian Weekly) , title= The lose-lose logic of the machine zone , passage=The US gaming industry, in a pamphlet called Demystifying Slot Machines […], argues that "slot manufacturers need to build devices for a society with a decreasing attention span and an increasing demand for exciting, fast-paced entertainment, all in a marketplace overflowing with competing entertainment options".}}

Careful, strategic use of rules to achieve one's purposes, as one would use the rules of a game.

Noun

The sport of competing in races.

* 1870 , Delabere Pritchett Blaine, An encyclopaedia of rural sports (page 231)

Chariot racings are probably, however, those in which the horse first distinguished himself as a courser, and we believe our earliest notices on the subject point to those of Persia, which were practised at the sacrifices made to the sun