Whats the difference between rare and medium rare in a steak?

when we go to a resturaunt that serves those kind of steaks and i keep hearing this "how would you like your steak, rare or medium rare?" and if im guessing it has to do with the pinkness on the steak. does anyone know about this? also what about the eggs, i hear if you want the eggs over-easy but i dont... show more when we go to a resturaunt that serves those kind of steaks and i keep hearing this "how would you like your steak, rare or medium rare?" and if im guessing it has to do with the pinkness on the steak. does anyone know about this? also what about the eggs, i hear if you want the eggs over-easy but i dont know what it means to that? thanks
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