I. ˈki-liŋ noun
Date: 15th century
1. : the act of one that kills
2. : kill 2a
3. : a sudden notable gain or profit
made a killing in the stock market
II. adjective
Date: 15th century
1. : that kills or relates to killing
2. : highly amusing
3. : extremely difficult to deal with
the suspense is killing
also : calling for great strength, stamina, or endurance
a killing schedule
• kill·ing·ly -lē adverb