up I .
➡ tie up
II .
1.
to attach an animal to sth with a rope, chain, etc. :
He left his dog tied up to a tree.
2.
[ usually passive ] to connect or link sth to sth else :
Her behaviour is tied up with her feelings of guilt.
—related noun tie-up
3.
[ often passive ] to invest money so that it is not easily available for use :
Most of the capital is tied up in property.
4.
to deal with all the remaining details of sth :
We are hoping to tie up the deal by tomorrow.
I went into the office for an hour to tie up any loose ends (= finish remaining small jobs) .