decades-long
adjective
de·cades-long
ˈde-ˌkādz-ˌlȯŋ 
variants
or less commonly decadeslong
: lasting two or more decades : occurring over a period of two or more decades
a decades-long career
… no discussion of wolf research would be complete without mention of this fascinating, decades-long study.—
Robert R. Ream
Robert R. ReamHis decades-long accumulation of books makes an eclectic mix …—Stephen Mihm
Stephen MihmExamples of decades-long in a Sentence
Recent Examples on the Web
The $60 million spectacle is the culmination of a decades-long relationship between a president and a sport that harnessed bravado to reach America’s most prominent address.
—Zac Anderson, USA Today, 12 June 2026
Disclosure Day, based on an original story by Spielberg, centers on a decades-long government conspiracy to cover up the existence of alien life, and the group of defectors intent on releasing that intel to the public.
—Brianna Zigler, Entertainment Weekly, 11 June 2026
Sir Ridley Scott is a true visionary whose decades-long legacy has left an immeasurable impact on global cinema and culture.
—Pete Hammond, Deadline, 10 June 2026
Researchers say this period was marked by a slowdown of decades-long progress against cardiovascular disease.
—Khloe Quill, FOXNews.com, 10 June 2026
See All Example Sentences for decades-long
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Zac Anderson, USA Today, 12 June 2026
Disclosure Day, based on an original story by Spielberg, centers on a decades-long government conspiracy to cover up the existence of alien life, and the group of defectors intent on releasing that intel to the public.
—Brianna Zigler, Entertainment Weekly, 11 June 2026
Sir Ridley Scott is a true visionary whose decades-long legacy has left an immeasurable impact on global cinema and culture.
—Pete Hammond, Deadline, 10 June 2026
Researchers say this period was marked by a slowdown of decades-long progress against cardiovascular disease.
—Khloe Quill, FOXNews.com, 10 June 2026
See All Example Sentences for decades-long
Cite this Entry
“Decades-long.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/decades-long. Accessed 20 Jun. 2026.
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