Weakness of body or mind, from any cause; imbecility; infirmity; want of strength, physical or intellectual; as feebleness of the body or limbs; feebleness of the mind or understanding.

Want of fullness or loudness; as feebleness of voice.

Want of vigor or force; as feebleness of exertion, or of operation.

Defect of brightness; as feebleness of light or color.