classofmatter
nounUK /ˈklɑːs əv ˈmætə/
US /ˈklæs əv ˈmætər/
A class of matter is a group of things that are alike in how they are made.
Solids, liquids, and gases are each a class of matter.
RELATED WORDS
OTHER MEANINGS
2. A group of students learning together in school.
My class of matter scientists is doing an experiment today.
3. A category in a game or contest.
The judges put the clay models in a special class of matter.
4. A set of things grouped by shared features.
Water and juice belong to the same class of matter called liquids.