The word grinding can mean many things:

• Grinding is a manufacturing process that uses friction with a rough surface to wear away or smooth the surface of a work piece. See also grinder for a description of mechanisms used for grinding materials into a powder.
• Grinding is a form of preparing food for eating, or for use in other forms of cooking. For example, bread and pasta rely on grinding of the flour, the production of tahini (sesame seed paste) involves grinding of the seeds, ground almonds are an important ingredient in many dishes.
• Grinding in MMORPGs, is gaining in-game experience strictly from the killing of mobs.
• Grinding is a modern dancing style which involves two or more partners rubbing their bodies on one another in a sexual manner, a type of public frotteurism. It is often performed in nightclubs that play pop, urban, and dance music. The most common techniques are:
  • Two dancers face each other and straddle each other's thighs so as to facilitate the rubbing of genitals through the clothing.
  • Two dancers face the same direction so that one's buttocks are rubbing on the other's groin.
• Grinding is the performing of a trick called a "grind" in various sports:
  • In skateboarding, a grind is performed when skidding the trucks against the surface. See Skateboarding trick.
  • In freestyle snowboarding and skiing, a grind is performed when on a surface other than snow, e.g. rail grinds.
  • Grinds are also performed in freestyle biking (BMX, unicycle) and aggressive skating, and with special shoes.

  External links: Community website covering grinding in multiple sports and other videos [1] [2]

• The grind of a sharp edge is its shape in cross-section, including the curvature of the two surfaces that make the edge and the angle between them.
• Grinding was a name for prettyprinting in some LISP circles.

• Grinding Grinding is a sexual term that describes the act where the female thrusts her hips forward and gyrates to enhance sexual pleasure.