1. The overall condition of an organism at a given time.
2. Soundness, especially of body or mind; freedom from disease or abnormality.
3. A condition of optimal well-being: concerned about the ecological health of the area.
4. A wish for someone's good health, often expressed as a toast.
[Middle English helthe, from Old English hǣlth; see kailo- in the Appendix of Indo-European roots.]
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