v. t. | 1. | To make thin or slender, as by mechanical or chemical action upon inanimate objects, or by the effects of starvation, disease, etc., upon living bodies. |
| 2. | To make thin or less consistent; to render less viscid or dense; to rarefy. Specifically: To subtilize, as the humors of the body, or to break them into finer parts. |
| 3. | To lessen the amount, force, or value of; to make less complex; to weaken. |
v. i. | 1. | To become thin, slender, or fine; to grow less; to lessen. |
a. | 1. | Made thin or slender. |
| 2. | Made thin or less viscid; rarefied. |