the act of making a marriage or relationship complete by having sex （初次）行房；通过性交使婚姻或两人关系圆满 the fact of making something complete or perfect 完成；使完美
Word Originlate Middle English: from Latin consummatio(n-), from the verb consummare, from con- ‘altogether’ + summa ‘sum total’, feminine of summus ‘highest, supreme’.