Near mint - almost perfect may have very light scratch or very light edge wear either on front/back. Could be off centered.
Excellent condition - will have a few light scratches, or light edge wear, or off center, or it may have a slight bend to the card
Light played - will have a minor crease, may have a few scratches, might have a small stain, multiple chippings or edge wear on front/back, light corner damage
Moderately played - will have a few creases and/or damaged corners, edge wear front/back, multiple scratches, dents, little bit faded or dirty or have a light peel
Heavily played - will have multiple creases, rounded corners, a lot of scratches, water damage, ripped, edge wear, dirty, dents or peeling.