I . ˌclose ˈup
1.
when a wound closes up , it heals
2.
to hide your thoughts or emotions :
She closed up when I asked about her family.
II . ˌclose ˈup
close up | ˌclose sth ↔ ˈup
1.
to shut and lock sth such as a shop / store or a building, especially for a short period of time :
Why don't we close up and go out for lunch?
Can the last one out close up the office?
OPP open up
2.
to come closer together; to bring people or things closer together :
Traffic was heavy and cars were closing up behind each other.
3.
to become narrower and less open :
Every time he tried to speak, his throat closed up with fear.
OPP open up
III . close ˈup
➡ close to