An example of concrete is evidence that the world is not flat.
An example of concrete is to form small pieces of stone into one solid mass.
An example of concrete is what many driveways are made of.
Concrete objects such as trees.
Had the concrete evidence needed to convict.
A concrete noun.
Once arrested, I realized that handcuffs are concrete, even if my concept of what is legal wasn’t.
The office building had concrete flower boxes out front.