Meanings
colloquialkiller, murderer (usually either a paid killer, contract killer, gunman, hitman or a serial killer, often in proper nouns, e.g., in tabloids)
colloquialhitman , ( contract killer ) killer
Er hat einen Killer engagiert, der sie töten soll.
Examples
GermanEnglish
Was hat Tom zu einem Killer gemacht?What turned Tom into a killer?
Ich sah den Killer.I saw the killer.