Definition from Wiktionary, the free dictionary
(Redirected from be up against)
- (idiomatic) Facing; challenging, or opposing.
- If you try to change the school schedule like that, you'll be up against legions of angry parents.
- In contact with, abutting.
- If the tree grows up against the garden wall then either the tree will be crowded and stunted or the wall will be pushed out.