/ˈkɒŋkri:t ||; ˈkɑnkrit/adj real or definite; not only existing in the imagination 确实的；具体的: Can you give me a concrete example of what you mean?能否举个具体例子说明你的意思？ [OPP] abstract 反义词为abstract➔concretelyadv
concrete²
/ˈkɒŋkri:t ||; ˈkɑnkrit/noun [U] a hard substance made from cement mixed with sand, water, small stones (gravel), etc, that is used in building 混凝土（一种由水泥、沙、水、细石等混制成的坚硬物质，用于建筑）: a modern office building of glass and concrete用玻璃及混凝土建成的现代化办公大楼a concrete floor/bridge混凝土地板╱桥☞picture at building 见building插图
concrete³
/ˈkɒŋkri:t ||; ˈkɑnkrit/verb [T] concrete sth (over) to cover sth with concrete 用混凝土涂于某物