Source : Webster's Revised Unabridged Dictionary (1913)

Circumnavigate \Cir`cum*nav"i*gate\, v. t. [imp. & p. p.
   {Circumnavigated}; p. pr. & vb. n. {Circumnavigating}.] [L.
   circumnavigatus, p. p. of circumnavigare to sail round;
   circum + navigare to navigate.]
   To sail completely round.

         Having circumnavigated the whole earth.  --T. Fuller.

Source : WordNet®

circumnavigate
     v : travel around, either by plane or ship; "We compassed the
         earth" [syn: {compass}]