A span can be the extent or reach of something or the distance between the tip of the thumb and the tip of the little finger when the hand is fully extended. Also…
A rev is an informal term; it is an abbreviation for a revolution of the crankshaft within an engine. The related verb means ‘to accelerate’ and it can have an engine, vehicle, or driver as its subject. Rev is also used figuratively, often followed by up, about other things and means ‘to increase’ in both activity and…
