ˈkɪlə n. 1 a a
person,
animal, or
thing that kills. b a murderer. 2 colloq. a an
impressive,
formidable, or
excellent thing (this
one is
quite difficult, but
the next one is a real killer). b a
hilarious joke. c a
decisive blow (his
brilliant header proved to be the killer). økiller
instinct 1 an
innate tendency to
kill. 2 a
ruthless streak. killer whale a
voracious cetacean, Orcinus
orca,
with a
white belly and prominent dorsal fin.