solid matter
nounUK /ˈsɒlɪd ˈmætə/
US /ˈsɑːlɪd ˈmætər/
Solid matter is stuff that keeps its own shape and does not flow like water.
A block of ice is solid matter, but when it melts it becomes liquid.
RELATED WORDS
OTHER MEANINGS
2. Matter that has a fixed volume and a fixed shape.
In science class we learned that solid matter has a definite shape.
3. Physical material that is not empty space or energy.
The telescope can detect solid matter in distant clouds of dust.
4. Something that is firm, real, and not imaginary.
Her promise was solid matter, not just empty talk.