Definitions of insoluble

1. without hope of solution; " an insoluble problem"

2. ( of a substance) not easily dissolved

3. Not soluble; in capable or difficult of being dissolved, as by a liquid; as, chalk is insoluble in water.

4. Not to be solved or explained; insolvable; as, an insoluble doubt, question, or difficulty.

5. That can not be dissolved; as, fat is insoluble in water; not to be explained.

6. Not capable of being dissolved: not to be solved or explained.

7. That cannot be dissolved; that cannot be explained.

8. That cannot be dissolved, as by a liquid.