Source : Webster's Revised Unabridged Dictionary (1913)

Approximately \Ap*prox"i*mate*ly\, adv.
   With approximation; so as to approximate; nearly.

Source : WordNet®

approximately
     adv : (of quantities) imprecise but fairly close to correct;
           "lasted approximately an hour"; "in just about a
           minute"; "he's about 30 years old"; "I've had about all
           I can stand"; "we meet about once a month"; "some forty
           people came"; "weighs around a hundred pounds";
           "roughly $3,000"; "holds 3 gallons, more or less"; "20
           or so people were at the party" [syn: {about}, {close
           to}, {just about}, {some}, {roughly}, {more or less}, {around},
            {or so}]