Definitions:
a large farming implement with one or more blades fixed in a frame, drawn over soil to turn it over and cut furrows in preparation for the planting of seeds.

a prominent formation of seven stars in the constellation ursa major (the great bear), containing the pointers that indicate the direction to the pole star.

a yoga pose assumed by lying on one's back and swinging one's legs over one's head until the outstretched feet approach or touch the floor

turn up the earth of (an area of land) with a plough, especially before sowing

(especially of a vehicle) move in a fast and uncontrolled manner

clear snow from (a road) using a snowplough

fail (an examination)