- Barrier to progress - Difficulty that must be overcome - Movable barrier - Vault - A movable frame of wattled twigs, osiers, or withes and
stakes, or sometimes of iron, used for inclosing land, for folding
sheep and cattle, for gates, etc.; also, in fortification, used as
revetments, and for other purposes. - In England, a sled or crate on which criminals were
formerly drawn to the place of execution. - An artificial barrier, variously constructed, over which
men or horses leap in a race.