Having verifiable existence
Composed of or relating to things that occupy space and can be perceived by the senses
To bring or come together into a united whole
To make or become physically hard
Made of concrete
I need concrete evidence before I'm a believer and I don't see that on the horizon.
The walls were solid concrete and windowless.
Jake trotted behind her, his nails clicking on the concrete floor.
They had no abstract ideas; in their minds all was concrete, visible and tangible.
Bound hand and foot he was thrown alive into a mould in which a block of concrete was about to be made.