/ ˌkɒnsəˈmeɪʃn; NAmE ˌkɑːn-/ noun [ C , U ]
1.
the act of making a marriage or relationship complete by having sex
2.
the fact of making sth complete or perfect :
The paintings are the consummation of his life's work.
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WORD ORIGIN
late Middle English : from Latin consummatio(n-) , from the verb consummare , from con- altogether + summa sum total, feminine of summus highest, supreme.