barrier
Definitions
noun
A structure that bars passage.
The bus went through a railway barrier and was hit by a train.
The bomber had passed through one checkpoint before blowing himself up at a second barrier.
An obstacle or impediment.
Even a small fee can be a barrier for some students.
America’s poverty line is $63 a day for a family of four. In the richer parts of the emerging world $4 a day is the poverty barrier. But poverty’s scourge is fiercest below $1.25 ([…]): people below that level live lives that are poor, nasty, brutish and short.
A boundary or limit.
Few marathon runners break the three-hour time barrier.
The downside of normalization is that it erects a defensive barrier between the real world and the perceived i.e. normalized world.
A node (in government and binding theory) said to intervene between other nodes A and B if it is a potential governor for B, c-commands B, and does not c-command A.
A separation between two areas of the body where specialized cells allow the entry of certain substances but prevent the entry of others.
verb
To block or obstruct with a barrier.
name
A surname from French.