a.

1. 有形的，实在的；具象的；具体的
   The word "apple" is a concrete noun.

   “苹果”是个具体名词。

   Shoes and trees are concrete objects.

   鞋和树是实物。

2. 具体的
   His plan is not yet concrete.

   他的计划尚不具体。

   Have you got any concrete proposals?

   你有没有具体的建议呢？

3. 混凝土的

n.[U]

1. 具体物
2. 混凝土；凝结物
   These buildings are made of concrete and steel.

   这些房屋是用钢和混凝土建成的。

vt.

1. 使凝固；使结合
2. 用混凝土修筑；浇混凝土于
   The workmen are concreting the road.

   工人们在用混凝土铺路。

vi.

1. 凝结，固结

adj.

/ˈkɒŋkriːt/ existing in a material or physical form.

n.

a building material made from a mixture of gravel, sand, cement, and water, forming a stone-like mass on hardening.

v.

1. /ˈkɒŋkriːt/ cover or fix solidly with concrete.
2. /kənˈkriːt/ archaic solidify.
   ▸make real.