non·​re·​spond·​er ˌnän-ri-ˈspän-dər How to pronounce nonresponder (audio)
plural nonresponders
: one that does not respond
survey nonresponders
: someone (such as a patient) or something (such as a cell) that does not respond to something (such as medical treatment or an antigen)
a patient who was a nonresponder to the experimental treatment

Examples of nonresponder in a Sentence

Recent Examples on the Web But one nonresponder surprised him. Susan Dunne, Hartford Courant, 7 Oct. 2022 To count those who don’t send in responses by the end of April, the Census Bureau will in mid-May begin to send out enumerators, the folks who go door to door collecting data from the nonresponders. Alex Davies, Wired, 12 Mar. 2020 In all, nonresponders in Bexar County will receive at least five mail-outs and as many as six visits. Elaine Ayala,, 20 Feb. 2020 That is mostly because response rates have declined, which forces the census to spend more money following up with nonresponders. Janet Adamy, WSJ, 27 June 2019 If your tumors kept growing after treatment, you were considered a nonresponder. Eric Boodman, STAT, 2 Apr. 2018 After months of this routine, the patients had their bodies scanned to assess the state of their tumors, and the researchers divided them into two groups: responders and nonresponders. Eric Boodman, STAT, 2 Apr. 2018

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'nonresponder.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1959, in the meaning defined above

Time Traveler
The first known use of nonresponder was in 1959

Dictionary Entries Near nonresponder

Cite this Entry

“Nonresponder.” Dictionary, Merriam-Webster, Accessed 17 Jul. 2024.

Medical Definition


non·​re·​spond·​er -ri-ˈspän-dər How to pronounce nonresponder (audio)
: one (as a person or a cell) that does not respond (as to medical treatment or to an antigen)
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