1. substances that are firm and stable in shape, not liquid or gas
2. solid food as opposed to liquids
3. three-dimensional geometric shapes or figures
Usage: mathematics

Examples

• The baby is ready to start eating solids.
• Ice and wood are examples of solids.
• In chemistry class, we studied the properties of solids, liquids, and gases.
• The doctor recommended a liquid diet before introducing solids again.
• Students learned to calculate the volume of various solids like cubes and spheres.
• Most metals remain solids at room temperature.
• The patient could only consume liquids, no solids, before surgery.