What does class mean in regard to lcd TVs?

Answer 1

It means that the TV's aren't exactly the size stated. e.g. a 42" class TV isn't exactly 42" diagonally, so they round the size to the nearest whole inch and call it the "class". So a 42" Class set could be 41.8" or 42.1".

Answer 2

All LCD TV's aren't exactly the size the ads say they are. A model may be advertised as 42" diagonally, but could be 41.8" or 42.1." Then they advertise it as being in the "CLASS." Measure yourself to be sure of the actual size.