NOUN (2)

1. the completion of marriage by sexual intercourse;

2. the act of bringing to completion or fruition;

The Collaborative International Dictionary of English v.0.48:

Consummation \Con`sum*ma"tion\ (k[o^]n`s[u^]m*m[=a]"sh[u^]n), n.
   [L. consummatio.]
   The act of consummating, or the state of being consummated;
   completion; perfection; termination; end (as of the world or
   of life).
   [1913 Webster]

         'T is a consummation
         Devoutly to be wished.                   --Shak.
   [1913 Webster]

         From its original to its consummation.   --Addison.
   [1913 Webster]

         Quiet consummation have,
         And renown['e]d be thy grave.            --Shak.
   [1913 Webster]

   Consummation of marriage, completion of the connubial
      relation by actual cohabition.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

104 Moby Thesaurus words for "consummation":
   Z, accomplished fact, accomplishing, accomplishment, achievement,
   achieving, acme, acme of perfection, apodosis, attaining,
   attainment, bitter end, carrying out, catastrophe, ceasing,
   cessation, climax, closure, coda, completing, completion,
   conclusion, crack of doom, culmination, curtain, curtains, death,
   decease, denouement, destination, destiny, discharge, dispatch,
   doom, effect, effectuation, end, end point, end result, ending,
   envoi, epilogue, eschatology, execution, expiration, fait accompli,
   fate, final result, final solution, final twitch, final words,
   finale, finality, finis, finish, finishing, fruition, fulfilling,
   fulfillment, goal, height, highest pitch, implementation, izzard,
   last, last act, last breath, last gasp, last things, last trumpet,
   last word, last words, latter end, mission accomplished,
   ne plus ultra, omega, payoff, peak, perfection, performance,
   period, peroration, pink, pink of perfection, pinnacle, production,
   quietus, realization, realizing, resolution, resting place,
   stoppage, stopping place, success, summit, swan song, term,
   terminal, termination, terminus, top, topping-off, ultimate,
   windup