murderer

noun

mur·​der·​er ˈmər-dər-ər 

: one who murders

especially : one who commits the crime of murder

Synonyms of murderer

• assassin
• killer

Examples of murderer in a Sentence

the murderer was sentenced to life in prison without the possibility of parole

Recent Examples on the Web

At his funeral back in Chicago, the boy’s mother, Mamie Till, insisted on an open casket so all the world could see what racist murderers had done to her only son. — Leonard Greene, New York Daily News, 25 July 2026

Over the past four seasons, Voit has gone from being a brutal murderer to a key informant for the FBI’s Behavioral Analysis Unit. — Hedy Phillips, PEOPLE, 23 July 2026

Duncan had been attacked by the GOP due to questions about being a murderer. — Emily Hallas, The Washington Examiner, 22 July 2026

This psychological thriller stars Guy Pearce as Leonard Shelby, a man with anterograde amnesia struggling to track down his wife’s murderer using a system of tattoos and notes. — Erik Kain, Forbes.com, 4 July 2026

Word History

First Known Use

14th century, in the meaning defined above

Phrases Containing murderer

• mass murderer

Legal Definition

murderer

noun

mur·​der·​er ˈmər-dər-ər 

: a person who commits murder