understeer/oversteer definition

[Andrei Kogan <abk@phy.duke.edu>]

Hello,
Can someone tell me what the definition of the oversteer/understeer terms
is? How
does understeering/oversteering affects the behavior of a car on turns ,
and also what
does it depend on ( that is, what are the factors determining whether the
car will oversteer/understeer).
What's the normal behavior of a car with proper wheel alignment, and is
there typically a difference in the degree
of the oversteer/understeer between say a mass-market car and  a
race/performance oriented car?

Thanks,Andrei

I have been trying to figure it out from the context for a while, but it
doesn't seem like it will happen.