link to source (http://www.pcgamer.com/pc-gaming-terms-and-their-true-meanings/#page-1)
The language of gaming is constantly mutating. For instance, "lag" used to refer to delays in client/server communication, but lately we've heard it used as if it's synonymous with "low framerate." Baffling. To help clear some things up, we've asked regular PC Gamer writer and all-round lexical savant Richard Cobbett (http://www.richardcobbett.com/) to create a brief glossary of PC gaming's most important terms and their modern definitions (with a few additions of our own).
Bunch of terms explained in the source page.