kill|er «KIHL uhr», noun, adjective.
–n.
1. a person, animal, or thing that kills.
2. a criminal who recklessly or wantonly kills. SYNONYM(S): butcher.
3. = killer whale. (Cf. ↑killer whale)
–adj.
1. having no equal; unrivaled; overwhelming: »
While some publishers search for a killer mass-market product…others take smaller steps (Rolling Stone).
2. killing; lethal; devastating: »
Her [the writer's] smartest move has been to choose living victims for her killer bios (Time).
Useful english dictionary. 2012.