Source : Webster's Revised Unabridged Dictionary (1913)

Perigee \Per"i*gee\, Perigeum \Per`i*ge"um\, n. [NL. perigeum,
   fr. Gr. ? about, near + ? the earth: cf. F. p['e]rig['e]e.]
   (Astron.)
   That point in the orbit of the moon which is nearest to the
   earth; -- opposed to {apogee}. It is sometimes, but rarely,
   used of the nearest points of other orbits, as of a comet, a
   planet, etc. Called also {epigee}, {epigeum}.

Source : WordNet®

perigee
     n : periapsis in Earth orbit; the point in its orbit where a
         satellite is nearest to the Earth [ant: {apogee}]