ok, stop with the corny webster's definitions . . . there are a few things that are considered racist.
FIrst off, judging and condemning an individual just because of their ethnicity etc is racist. I think that is something we can all agree on.
Then there is the matter of generalizations. For instance, if you hear a crime was committed in downtown compton, you may or may not assume the criminal was black. If it is true that a majority of criminals caught in compton are in fact black, then the assumption would have cogency and would be a legitimate argument. Some see this as practical while others see it as another form of racism. There are all sorts of grey areas with different scenarios but that sums up that bit.
*note, while democrats in the US would call the form above undoubtedly racist, they nevertheless organize their precinct walks by racial demographics (republicans use past voting records)
Then there is another sort . . . where someone who is not a minority says something negative about someone who is a minority. This is soo obviously racist. Who cares if its true or not, how dare they!
an example of this would be pointing out that Islam in its pure form is hardly a peaceful religion . . . oh no RACIST!
Maybe we should be talking about discrimination against typres of cars.