un·​sure | \ ˌən-ˈshu̇r How to pronounce unsure (audio) , -ˈshər, especially Southern -ˈshȯr \

Definition of unsure

: not marked by or given to feelings of confident certainty : not sure was unsure of what to do
unsure of oneself
: lacking confidence in one's abilities … he's a little unsure of himself when it comes to the music world …— Seth Mnookin

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Examples of unsure in a Sentence

Recent Examples on the Web Researchers are also still unsure of the characteristics that put certain people at higher risk of these exaggerated responses, though genetics and age both appear to play contributing roles. National Geographic, "A one-two punch to fight COVID-19," 7 May 2020 Plus, scientists are still unsure how long antibodies remain in the blood following a coronavirus infection. Olivia Goldhill, Quartz, "The latest coronavirus antibody test is a lot more accurate," 3 May 2020 Second, scientists are still unsure if people who have had the novel coronavirus are immune to future infections, nor for how long any immune protection against reinfection could last. Claire Maldarelli, Popular Science, "The CDC just added six official COVID-19 symptoms," 27 Apr. 2020 Some schools have canceled classes indefinitely and others are still unsure if graduation ceremonies will even be possible. Rebecca Hennes, Houston Chronicle, "Splendora high seniors try to stay positive after COVID-19 robs them of end-of-year traditions," 2 Apr. 2020 Even if healthcare systems were up to par, researchers are still unsure of how to treat and contain the virus. Alexandria Williams, Quartz Africa, "African countries are evacuating some students from China over coronavirus, but most hesitate," 2 Mar. 2020 Despite that, a recent poll found that 46% of Americans are still unsure about the debunked theory. CBS News, "Ohio pediatrician receives threats after her pro-vaccine TikTok video goes viral," 21 Jan. 2020 Investigators are still unsure whether inclement weather played a factor in the crash. Benjamin Vanhoose, PEOPLE.com, "Texas Family of 5 Killed After Their Small Plane Slammed Into the Ground and Was 'Destroyed'," 29 Nov. 2019 Jovic is unsure if her summer marketing internship — scheduled to begin next month in New Jersey — will occur and what the future holds. Hayes Gardner, The Courier-Journal, "They came to the US to play college sports. Now, COVID-19 has left them stuck far from home," 30 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unsure.' 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 unsure

15th century, in the meaning defined above

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Time Traveler for unsure

Time Traveler

The first known use of unsure was in the 15th century

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Statistics for unsure

Last Updated

31 May 2020

Cite this Entry

“Unsure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsure. Accessed 3 Jun. 2020.

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More Definitions for unsure


How to pronounce unsure (audio)

English Language Learners Definition of unsure

: not certain about something : not sure

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More from Merriam-Webster on unsure

Thesaurus: All synonyms and antonyms for unsure

Rhyming Dictionary: Words that rhyme with unsure

Spanish Central: Translation of unsure

Nglish: Translation of unsure for Spanish Speakers

Britannica English: Translation of unsure for Arabic Speakers

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