ˈtie-up BrE AmE noun [countable] informal
1 . an agreement to become business partners
tie-up with
IBM’s tie-up with Auspex System Inc
2 . British English a strong connection between two or more things
tie-up between
the tie-up between class interests and politics
3 . American English a situation in which traffic is prevented from moving or there is a problem which prevents a system or plan from working
⇨ tie up at ↑ tie 1