biological weapon

noun

: a harmful biological agent (such as a pathogenic microorganism or a neurotoxin) used as a weapon to cause death or disease usually on a large scale

Examples of biological weapon in a Sentence

Recent Examples on the Web

Soviet defectors later revealed the truth — the U.S.S.R. had experimented with smallpox as a possible biological weapon. —Emilie Le Beau Lucchesi, Discover Magazine, 4 Oct. 2024

Alien Abyss: The Department of Alien Research is breeding a biological weapon. —Grace Tucker, The Enquirer, 10 Sep. 2024

There is no direct evidence for this, and virologists, geneticists, and the US intelligence community largely agree that SARS-CoV-2 was not developed as a biological weapon nor was it genetically engineered. —Beth Mole, Ars Technica, 21 Mar. 2023

Despite disagreement among the agencies about which hypothesis was more likely, the intelligence community concurred that Covid-19 wasn’t developed intentionally as a biological weapon. —Riley Griffin, Fortune, 24 June 2023

Word History

First Known Use

1918, in the meaning defined above

Kids Definition

biological weapon

noun

: a harmful living thing (as a disease-causing bacterium) or something (as a poisonous substance) produced by a living thing that is used as a weapon to cause death or disease

Medical Definition

biological weapon

noun

biological weap·​on -ˈwep-ən 

: a harmful biological agent (as a pathogenic microorganism or a neurotoxin) used as a weapon to cause death or disease usually on a large scale