The close of a period of time or an activity is the end of it. He is known to be close with his money. To change from being open to not being open, or to cause something to do this:
We want the World Cup, Xi Jinping tells Infantino in landmark meeting
Close usually implies that something has been in. Giving or spending with reluctance; Close, end, conclude, finish, complete, terminate mean to bring or come to a stopping point or limit.
To bring or draw something to a close means to end it.