Definitions

1. adjective

unfavorable or harmful; opposing or contrary

“The adverse weather conditions forced us to cancel the outdoor event.”

2. noun

an unfavorable or opposing condition; an opposing or contrary person or thing

“The company faced an adverse reaction to its new product launch.”

3. verb

to be unfavorable or opposing to; to have an unfavorable or opposing effect on

“The new policy will adversely affect the environment.”