In your instance, Meniscus refers to the cartilage of your knee, both the lateral or medial meniscus. In medical terms
Lateral means side(s) and Medial means the middle or lying near the middle.
It reveals some wear and tear, thinning - with possible surgical changes to the meniscus. Chondral means pertaining to cartilage - the meniscus is made up of cartilage. It acts as a cushion, shock absorber if you will - of the knee joint. In my opinion this may be the reason for your knee pain.