/blɒk ||; blɑk/noun[C] 1 a large, heavy piece of sth, usually with flat sides 一大块（通常各面平坦）: a block of wood 一块木头huge concrete blocks 巨大的混凝土块
2 a large building that is divided into separate flats or offices 大厦；大楼；大建筑物: a block of flats 公寓大楼 ☞Look at apartment block and office block. 参看 apartment block 及 office block。
3 a group of buildings in a town which has streets on all four sides 街区: The restaurant is three blocks away. 餐厅离这里有三条街。
4 a quantity of sth or an amount of time that is considered as a single unit 成为一个单元的东西或时间: The class is divided into two blocks of fifty minutes. 这堂课分成两部份，每部份五十分钟。
5 [usu.sing] a thing that makes movement or progress difficult or impossible 障碍: a block to further progress in the talks 使会谈无法进行下去的障碍 ☞Look at roadblock. 参看 roadblock。
have a block (about sth) to be unable to think or understand sth properly （对某事物）无法恰当思考或了解:
I had a complete mental block. I just couldn't remember his name. 我脑筋打结，就是想不起他的名字。