Help with terminology: Cold Call

Hi-
I'm new to poker and have a somewhat dumb question on terminology. I'm ready a Sklansky book and he has said a couple of times that you should rarely (~ 1 in 500 hands) cold call a raise.

What the heck is a "cold call"? Can someone give me an example or two? I've searched on-line for an answer, but the results are contradictory and/or confusing.
Thanks,
Mark

Its typically a Limit term meaning to call more than 1 bet in 1 go e.g.

Player 1 bets, player 2 raises (to 2 bets) , You Cold call the 2 bets.


It can be used in No Limit meaning pretty much the same thing, but bet sizes are less defined so

Player 1 raises to 6BB, You cold call with 66 hoping to hit your set.




Welcome to FTR


Edit: The reasoning behind that Sklansky quote is that if your hand is strong enough to cold call with, then you should almost always be raising instead.

Okay, that makes sense. Thanks.
-Mark