trans·​fu·​sion | \ tran(t)s-ˈfyü-zhən How to pronounce transfusion (audio) \

Definition of transfusion

1 : an act, process, or instance of transfusing especially : the process of transfusing fluid (such as blood) into a vein or artery
2 : something transfused

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Other Words from transfusion

transfusional \ tran(t)s-​ˈfyüzh-​nəl How to pronounce transfusional (audio) , -​ˈfyü-​zhə-​nᵊl \ adjective

Did You Know?

When blood transfusions were first attempted by Europeans in the early 1600s, they were met with skepticism, since the established practice was to bleed patients, not transfuse them with blood. Some patients were transfused with animal blood, and so many died as a result that by 1700 transfusions had been widely outlawed. Not until 1900 were the major blood groups (A, B, AB, and O) recognized, making transfusions safe and effective.

Examples of transfusion in a Sentence

Without a transfusion her chances of survival were slim.
Recent Examples on the Web Members of the Trump administration have touted the promise of plasma transfusion as well. Cassidy Morrison, Washington Examiner, "Plasma therapy successes stoke high hopes," 10 July 2020 Physicians have been using convalescent plasma transfusion to treat infectious diseases for more than 100 years. Cassidy Morrison, Washington Examiner, "Plasma therapy successes stoke high hopes," 10 July 2020 Why can’t a person with type A blood receive a transfusion of type B blood? Julie Washington, cleveland, "What is a blood type, and why it might matter if you get the coronavirus?," 30 June 2020 Never mind that White, who was not gay, got the disease from a blood transfusion. Chris Sikich, The Indianapolis Star, "Race, gender and politics: A man pointed a gun at Dr. Myers, a woman refused to shake Sen. Melton's hand," 23 June 2020 Nursing assistants were classmates or interns (depending on the day) and a blood transfusion was my cue to take a break. Wunmi Bakare, Essence, "An Open Love Letter To Sickle Cell Disease, My Invisible Disability," 19 June 2020 The convalescent plasma therapy works through a transfusion of plasma from patients who have recovered from the coronavirus. Alison Medley, Houston Chronicle, "'I am blessed': Houston-area doctor recovers from COVID-19 after innovative treatment," 11 June 2020 A week after transfusion, 36 percent of patients showed clinical improvement. Fox News, "Study shows 76 percent of coronavirus patients improve after plasma transfusion," 5 June 2020 During the precarious moments post-birth, more members of the expert team at the zoo were safely collecting blood from other elephants in case Nelson needed a transfusion. Benjamin Vanhoose,, "Houston Zoo Welcomes Elephant Calf Named Nelson After Performing Emergency Surgery on Newborn," 15 May 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'transfusion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of transfusion

1578, in the meaning defined at sense 1

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Time Traveler for transfusion

Time Traveler

The first known use of transfusion was in 1578

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Statistics for transfusion

Last Updated

3 Aug 2020

Cite this Entry

“Transfusion.” Dictionary, Merriam-Webster, Accessed 9 Aug. 2020.

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More Definitions for transfusion


trans·​fu·​sion | \ trans-ˈfyü-zhən How to pronounce transfusion (audio) \

Kids Definition of transfusion

1 : the process of passing a fluid (as blood) into a vein of a person or animal
2 : the act of giving something a fresh supply The club needs a transfusion of new members.


trans·​fu·​sion | \ tran(t)s-ˈfyü-zhən How to pronounce transfusion (audio) \

Medical Definition of transfusion

1 : the process of transfusing fluid (as blood) into a vein or artery
2 : something transfused

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