Noah Webster's New International Dictionary of the English Language

1. (adv.) In a poor manner or condition; without plenty, or sufficiency, or suitable provision for comfort; as, to live poorly.

2. (adv.) With little or no success; indifferently; with little profit or advantage; as, to do poorly in business.

3. (adv.) Meanly; without spirit.

4. (adv.) Without skill or merit; as, he performs poorly.

5. (a.) Somewhat ill; indisposed; not in health.