(noun) the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
Definitions for Game
(adjective) having a desire or inclination (as for a specified course of action)
(noun) a competitive encounter between individuals or groups carried on for amusement , exercise, or in pursuit of a prize
(noun) a method worked out in advance for achieving some objective