The Collaborative International Dictionary of English v.0.48:
Approximate \Ap*prox"i*mate\, a. [L. approximatus, p. p. of approximare to approach; ad + proximare to come near. See Proximate.] 1. Approaching; proximate; nearly resembling. [1913 Webster] 2. Near correctness; nearly exact; not perfectly accurate; as, approximate results or values. [1913 Webster] Approximate quantities (Math.), those which are nearly, but not, equal. [1913 Webster]