hold together | ˌhold sth ↔ toˈgether
1.
to remain, or to keep sth, united :
A political party should hold together.
It's the mother who usually holds the family together.
2.
( of an argument, a theory or a story ) to be logical or consistent :
Their case doesn't hold together when you look at the evidence.
—compare hang together at hang
3.
if a machine or an object holds together or sth holds it together , the different parts stay together so that it does not break