: an acute or chronic disease in humans and other warm-blooded animals characterized by an abnormal increase in the number of white blood cells in the tissues and often in the blood

Examples of leukemia in a Sentence

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In November 2025, journalist Tatiana Schlossberg published an essay in the New Yorker about her acute myeloid leukemia diagnosis at 34. Lynn Godfrey, Forbes.com, 10 July 2026 The couple had a son Christopher, who died of leukemia in his 20s, per The New York Times. Joyann Jeffrey, PEOPLE, 10 July 2026 Pepper plays Coach, a former NYPD police officer and 9/11 first responder suffering from leukemia, a result of his work at ground zero. Nellie Andreeva, Deadline, 9 July 2026 Base editing was used for the first time in a 2022 clinical trial to modify the immune cells of a UK teenager after doctors exhausted all other options to treat her form of leukemia. Katie Hunt, CNN Money, 8 July 2026 See All Example Sentences for leukemia

Word History

Etymology

New Latin

First Known Use

1850, in the meaning defined above

Time Traveler
The first known use of leukemia was in 1850

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Cite this Entry

“Leukemia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/leukemia. Accessed 14 Jul. 2026.

Kids Definition

: a disease of warm-blooded animals including human beings that is a kind of cancer in which there is an abnormal increase in the number of white blood cells in the tissues and often in the blood

Medical Definition

variants also leucemia
lü-ˈkē- also lü-ˈsē-
or chiefly British leukaemia also leucaemia
: an acute or chronic disease of unknown cause in humans and other warm-blooded animals that involves the blood-forming organs, is characterized by an abnormal increase in the number of white blood cells in the tissues of the body with or without a corresponding increase of those in the circulating blood, and is classified according to the type of white blood cell most prominently involved see acute lymphoblastic leukemia, acute myelogenous leukemia, chronic lymphocytic leukemia, chronic myelogenous leukemia, feline leukemia, lymphoblastic leukemia, lymphocytic leukemia, monocytic leukemia, myelogenous leukemia, promyelocytic leukemia

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