How to pronounce grind

1 : to make or be made into powder or small pieces by rubbing The mill grinds wheat into flour. 2 : to wear down, polish, or sharpen by friction grind an ax. 3 : to rub together with a scraping noise grind the teeth. 4 : to operate or produce by or as if by turning a crank.

Grinding refers to the playing time spent doing repetitive tasks within a game to unlock a particular game item or to build the experience needed to progress smoothly through the game.