The Collaborative International Dictionary of English v.0.48:

Apogee \Ap"o*gee\, n. [Gr. ? from the earth; ? from + ?, ?,
   earth: cf. F. apog['e]e.]
   1. (Astron.) That point in the orbit of the moon which is at
      the greatest distance from the earth.
      [1913 Webster]

   Note: Formerly, on the hypothesis that the earth is in the
         center of the system, this name was given to that point
         in the orbit of the sun, or of a planet, which was
         supposed to be at the greatest distance from the earth.
         [1913 Webster]

   2. Fig.: The farthest or highest point; culmination.
      [1913 Webster]

WordNet (r) 3.0 (2006):

apogee
    n 1: a final climactic stage; "their achievements stand as a
         culmination of centuries of development" [syn: apogee,
         culmination]
    2: apoapsis in Earth orbit; the point in its orbit where a
       satellite is at the greatest distance from the Earth [ant:
       perigee]

Moby Thesaurus II by Grady Ward, 1.0:

129 Moby Thesaurus words for "apogee":
   Earth insertion, LEM, LM, acme, all, apex, aphelion,
   astronomical longitude, attitude-control rocket, autumnal equinox,
   ballistic capsule, brow, burn, cap, capstone, capsule, ceiling,
   celestial equator, celestial longitude, celestial meridian, circle,
   climax, cloud nine, colures, crest, crown, culmen, culmination,
   deep-space ship, docking, docking maneuver, ecliptic, edge, end,
   equator, equinoctial, equinoctial circle, equinoctial colure,
   equinox, extreme, extreme limit, extremity, far cry, far piece,
   ferry rocket, fuel ship, galactic longitude, geocentric longitude,
   geodetic longitude, giant step, good ways, great circle,
   great distance, heaven, heavens, height, heliocentric longitude,
   high noon, highest degree, highest pitch, highest point, injection,
   insertion, limit, long chalk, long haul, long range, long road,
   long run, long step, long way, longitude, lunar excursion module,
   lunar module, manned rocket, maximum, meridian, module, moon ship,
   mountaintop, multistage rocket, ne plus ultra, no place higher,
   noon, nth degree, orbit, parking orbit, peak, perigee, perihelion,
   period, pinnacle, pitch, point, pole, reentry, ridge, rocket,
   seventh heaven, shuttle rocket, sky, small circle, soft landing,
   solstitial colure, space capsule, space docking, space rocket,
   spacecraft, spaceship, spire, summit, the whole, tidy step, tip,
   tip-top, top, trajectory, upmost, upper extremity, uppermost,
   utmost, utmost extent, uttermost, vernal equinox, vertex, very top,
   zenith, zodiac, zone