1. 1) bomb. 2) (Coll.) fart. 2. 1) boom (at a barrier), gate, bar. 2) customs. 3) wagon tongue. 4) (Naut.) boom.
1 hindrance, obstacle, holdup. 2 barrier, restriction.
1 crossbar. 2 bolt. 3 barrier.
1) deterrent. 2) hindrance, obstacle, barrier.
1 obstacle, obstruction. 2 barrier, fence, wall. 3 (Ling.) closure.