assassin

noun

as·​sas·​sin ə-ˈsa-sᵊn 

plural assassins

1

: a person who commits murder

especially : one who murders a politically prominent person either for money or from fanatical adherence to a cause

… the location of the victim's gunshot wounds … might point to a professional assassin.

—Wendy Fry

2

Assassin plural Assassins, history : a person belonging to a Shia Muslim sect during the time of the Crusades whose members were notorious for murdering prominent enemies

For a third of a century, no enemy of the Assassins had ever managed to elude them.

—Amin Maalouf

Synonyms of assassin

• murderer
• killer

Examples of assassin in a Sentence

John Wilkes Booth was the assassin of Abraham Lincoln.

shot down by an unknown assassin

Recent Examples on the Web

Miller called him an assassin on social media; Vice President JD Vance reposted the message. —Bill Goodykoontz, AZCentral.com, 29 Jan. 2026

The 384-page hardcover focuses on the game's main antagonist, crime lord Jaylen Vrax, and his intimidating assassin droid ND-5. —Jeff Spry, Space.com, 28 Jan. 2026

Matthew Macfadyen plays the assassin, Charles Guiteau. —David Frum, The Atlantic, 28 Jan. 2026

With a little more ease than should be the case and at the expense of gripping mystery taking shape, James and Jonny piece together a conspiracy involving local mobsters and Yakuza led by coke-snorting assassin Nakamura (multitalented Japanese artist Miyavi). —Richard Kuipers, Variety, 26 Jan. 2026

Word History

Etymology

Medieval Latin assassinus, from Arabic ḥashshāshīn, plural of ḥashshāsh worthless person, literally, hashish user, from hashīsh hashish

First Known Use

circa 1520, in the meaning defined at sense 2

Phrases Containing assassin

• assassin bug

Rhymes for assassin

• unfasten
• bason
• casson
• fasten
• cytochalasin
• diapason

Kids Definition

assassin

noun

as·​sas·​sin ə-ˈsas-ən 

: a person who kills another person

especially : one who murders a politically important person either for pay or from loyalty to a cause