Of or pertaining to murder; characterized by, or causing, murder or bloodshed; having the purpose or quality of murder; bloody; sanguinary; as, the murderous king; murderous rapine; murderous intent; a murderous assault
A murderous attack or other action is very violent and intended to result in someone's death. He made a murderous attack on his wife that evening
Someone who is murderous is likely to murder someone and may already have murdered someone. This murderous lunatic could kill them both without a second thought
capable of or conducive to bloodshed; "a cutthroat rogue"; "a homicidal rage"; "murderous thugs"