WordWeb Online

1. Lie adjacent to another or share a boundary
   "Canada butts against the U.S.";
   - border, adjoin, edge, abut, march, butt, butt on
    
2. Collide violently with an obstacle
   "I butted against the telephone pole";
   - run into, bump into, jar against, knock against

Derived forms: butting against, butts against, butted against

See also: bump

Type of: adjoin, collide with, contact, hit, impact, impinge on, meet, run into, strike, touch