From Longman Dictionary of Contemporary Englishkillerkill‧er1 /ˈkɪlə $ -ər/ ●●○ noun [countable]1KILLa person, animal, or thing that kills
Heart disease is America’s number one killer.
the hunt for her killers
weed killer →serial killer2informalGOOD/EXCELLENT something or someone that is very difficult, tiring, or boring
The new project is a killer.3informal something that is very exciting or impressive
I’m not saying the film is a killer, but it’s cool.killerkiller2 adjective [only before noun]1very harmful or dangerous
a killer hurricane
a swarm of killer bees2informal very attractive, good, impressive etc
a book called ‘How to Build a Killer Website’killer heels (=women’s shoes with very high heels)3 →killer instinct
