unprecedented
adjective
un·prec·e·dent·ed
ˌən-ˈpre-sə-ˌden-təd 
: having no precedent : novel, unexampled
unprecedentedly
adverb
Synonyms
Examples of unprecedented in a Sentence
… on one occasion, a president (Eisenhower) refers to himself as "conservative." Four years later, the Republican presidential nominee (Goldwater) announces that he is "a conservative." Another sixteen years later, Ronald Reagan, a self-declared conservative, is elected president by an overwhelming majority. By that time—1980—more Americans identify themselves as conservatives than as liberals. This was, and remains, a tectonic transformation, unprecedented in American history.
—
John Lukacs, Harper's, March 2008
Faced with an unprecedented crisis that combines cyclical turbulence with metastasizing digital technology that steals away revenue and readers at an alarming and seemingly accelerating rate (while offering newspapers only stingy payoffs), publishers and editors everywhere have thrown away their rule books—and, to find their way in this new and alien environment, are ready to implement previously unthinkable changes.
—Mark Fitzgerald et al., Editor & Publisher, August 2008
Many of the forces that initially sent the economy into a tailspin in 1929 and 1930 have been at work in the 2000s as well: a stock-market boom turned bust, a real estate boom turned bust, unprecedented levels of consumer debt.
—Justin Fox, Time, 10 Mar. 2008
Shakespeare served as exemplar of the writer who achieved success, and an unprecedented degree of financial reward, from his pen alone.
—Jonathan Bate, Harper's, April 2007
Fan fiction … was once mainly a fringe pursuit. Now, it's changing the world of fiction, as Internet exposure helps unknown authors find mainstream success. Some Web sites are attracting unprecedented numbers of readers and, in some cases, leading to book deals.
—John Jurgensen, Wall Street Journal, 16–17 Sept. 2006
Shocking as it is, more than a month after the hurricane hit, New Orleans is still, for all practical purposes, a ghost town. The entire population has left—an unprecedented situation in modern times in any major city anywhere.
—Tom Piazza, Why New Orleans Matters, 2005
The team has enjoyed unprecedented success this year.
This level of growth is unprecedented.
An unprecedented number of students are taking the class.
John Lukacs, Harper's, March 2008
Faced with an unprecedented crisis that combines cyclical turbulence with metastasizing digital technology that steals away revenue and readers at an alarming and seemingly accelerating rate (while offering newspapers only stingy payoffs), publishers and editors everywhere have thrown away their rule books—and, to find their way in this new and alien environment, are ready to implement previously unthinkable changes.
—Mark Fitzgerald et al., Editor & Publisher, August 2008
Many of the forces that initially sent the economy into a tailspin in 1929 and 1930 have been at work in the 2000s as well: a stock-market boom turned bust, a real estate boom turned bust, unprecedented levels of consumer debt.
—Justin Fox, Time, 10 Mar. 2008
Shakespeare served as exemplar of the writer who achieved success, and an unprecedented degree of financial reward, from his pen alone.
—Jonathan Bate, Harper's, April 2007
Fan fiction … was once mainly a fringe pursuit. Now, it's changing the world of fiction, as Internet exposure helps unknown authors find mainstream success. Some Web sites are attracting unprecedented numbers of readers and, in some cases, leading to book deals.
—John Jurgensen, Wall Street Journal, 16–17 Sept. 2006
Shocking as it is, more than a month after the hurricane hit, New Orleans is still, for all practical purposes, a ghost town. The entire population has left—an unprecedented situation in modern times in any major city anywhere.
—Tom Piazza, Why New Orleans Matters, 2005
The team has enjoyed unprecedented success this year.
This level of growth is unprecedented.
An unprecedented number of students are taking the class.
Recent Examples on the Web
One of the things that is unprecedented in particularly the CBS action is the disclosure of the investigation, the release of the documents for public comment.
—Cynthia Littleton, Variety, 8 Feb. 2025
This year the Chiefs are aiming for an unprecedented ‘three-peat’ and the game is a repeat of Super Bowl LVII in 2023 when the Chiefs beat the Eagles 38-35 in Glendale, Arizona.
—Eduardo Tansley, The Athletic, 8 Feb. 2025
This neglect is particularly egregious given the unprecedented privacy risks created by the infiltration of education technology (EdTech) into Pre-K-12 curricula.
—Yaakov Katz, Newsweek, 7 Feb. 2025
These oils entered the human diet at unprecedented levels after the invention of the mechanical screw press in 1888 enabled the extraction of oil from seeds in quantities that were never before possible.
—Mary J. Scourboutakos, The Conversation, 7 Feb. 2025
See all Example Sentences for unprecedented 
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Cynthia Littleton, Variety, 8 Feb. 2025
This year the Chiefs are aiming for an unprecedented ‘three-peat’ and the game is a repeat of Super Bowl LVII in 2023 when the Chiefs beat the Eagles 38-35 in Glendale, Arizona.
—Eduardo Tansley, The Athletic, 8 Feb. 2025
This neglect is particularly egregious given the unprecedented privacy risks created by the infiltration of education technology (EdTech) into Pre-K-12 curricula.
—Yaakov Katz, Newsweek, 7 Feb. 2025
These oils entered the human diet at unprecedented levels after the invention of the mechanical screw press in 1888 enabled the extraction of oil from seeds in quantities that were never before possible.
—Mary J. Scourboutakos, The Conversation, 7 Feb. 2025
See all Example Sentences for unprecedented
Dictionary Entries Near unprecedented
Cite this Entry
“Unprecedented.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unprecedented. Accessed 12 Feb. 2025.
Copy CitationKids Definition
unprecedented
adjective
un·prec·e·dent·ed
ˌən-ˈpres-ə-ˌdent-əd
ˈən-
: having no precedent : not done or experienced before
an unprecedented achievement
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