(grammar) 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.
(physiology) A separation between two areas of the body where specialized cells allow the entry of certain substances but prevent the entry of others.
(historical, in the plural) A martialexercise of the 15th and 16th centuries.
Verbit
(transitive) To block or obstruct with a barrier.
Esimerkit
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.