The word "consummate" has several meanings, but it generally refers to something that is perfect or complete in quality. It can also refer to a skill or ability that has been attained through much practice and experience. In terms of relationships, consummation means the act of completing or bringing something to its ultimate level of perfection or completion. This often refers to sexual intercourse as the final step in a romantic relationship, but it can also refer to any other activity that signifies the culmination of a process.