Definitions

1. adverb

in a bad or unsatisfactory manner; poorly

“She played the piano badly and everyone in the audience cringed.”

2. adverb

to a bad or unsatisfactory extent; severely

“He was injured badly in the car accident and spent weeks in the hospital.”

3. adverb

in a way that is not good or healthy; badly

“He had been smoking badly for years and was diagnosed with lung cancer.”