|1.||[ noun ] someone who causes the death of a person or animal|
|Related terms:||person murderer executioner garroter exterminator regicide poisoner suicide murder|
|2.||[ noun ] the causal agent resulting in death|
"heart disease is the biggest killer in the United States"
|Related terms:||causal_agent kill|
|3.||[ noun ] a difficulty that is hard to deal with|
"that exam was a real killer"
|Related terms:||difficulty kill|
|4.||[ noun ] (zoology) predatory black-and-white toothed whale with large dorsal fin; common in cold seas|
|Synonyms:||orca grampus sea_wolf Orcinus_orca killer_whale|
|Related terms:||dolphin Orcinus|