Webster’s Revised Unabridged Dictionary · 1913
Murderer
Mur′der·er (mûr′dẽr·ẽr), n. 1. One guilty of murder; a person who, in possession of his reason, unlawfully kills a human being with premeditated malice.
2. A small cannon, formerly used for clearing a ship's decks of boarders; — called also murdering piece. [Obs.]