Definition of "barrier" in 英语

noun

1. 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.

2. An obstacle or impediment.

   • Even a small fee can be a barrier for some students.

3. A boundary or limit.

   • Few marathon runners break the three-hour time barrier.

4. (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.

5. (physiology) A separation between two areas of the body where specialized cells allow the entry of certain substances but prevent the entry of others.

6. (historical) The lists in a tournament.

7. (historical, in the plural) A martial exercise of the 15th and 16th centuries.

verb

1. (transitive) To block or obstruct with a barrier.