approximate
ap·prox·i·mate
I
 /əˈprɑːksəmət/  adj  
  : almost correct or exact
   This is the approximate location of the ancient city.
   her approximate age
  : close in value or amount but not precise
   Can you give me the approximate cost of the repair?
  ap·prox·i·mate·ly  adv  
   The repair should cost approximately [=about, around, roughly] $200.
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ap·prox·i·mate
II
 /əˈprɑːksəˌmeıt/  verb  , -mates, -mat·ed, -mat·ing
  1 a : to be very similar to but not exactly like (something)
   [  + obj  ] I've finally found a vegetarian burger that approximates the taste of real beef.
    The colors in the pictures can only approximate the real thing.
   [  no obj  ] (chiefly Brit)
    — + to
    The colors in the pictures can only approximate to the real thing.
   
  1 b [  + obj  ] : to do or make a thing that is very similar to but not exactly like (something)
   an Australian who can approximate a strong New York City accent
  2 [  + obj  ] : to calculate the almost exact value or position of (something)
   Students learned to approximate [=estimate] the distance between the Earth and the planets.