(A) to consume your mind
(B) To take over something; control
(C) ** When something is completed or finalized
EXPLANATIONS BELOW
Concept note-1: -Use the noun consummation when you mean the point at which something is finalized or completed. Your graduation from college will be the consummation of four years of hard work. Consummation comes from the Latin verb consummare, which means to sum up or to finish.
Concept note-2: -In the context of marriage, consummation means the actualization of marriage. It is the first act of sexual intercourse after marriage between a husband and wife. Consummation is particularly relevant under canon law, where failure to consummate a marriage is a ground for divorce or an annulment.
Concept note-3: -specifically : the consummating of a marriage. : the ultimate end : finish.