What does not focal consolidation mean ?

If you are referring to a lung exam (usually either x-ray or CT scan), it means there is not an area of the lung that is taken up by abnormal inflammation of the lung tissue itself. This area, if present, could represent an area of pneumonia or some other inflammatory process that resembles pneumonia on the images. If an area like that was seen that is not focal, it means it is more widespread.

Focal consolidation is typically used to designate lung changes that are consistent with pneumonia, in your case pneumonia is not likely.