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 first year at the new location will coincide with the telecast’s move to YouTube after a decades-long run on ABC.
—Brent Lang, Variety, 26 Mar. 2026
As Truell takes a Zoom call, the image of Caro—legendary biographer of Lyndon Johnson and Robert Moses, known for his exhaustive, decades-long research—looms over his shoulder, sweatered, bespectacled, writing intently.
—Allie Garfinkle, Fortune, 24 Mar. 2026
The 73-year-old Pitino and 63-year-old Bill Self coached against each other for only the second time in the Hall of Famers' decades-long careers, meeting for the first time in March Madness.
—Cbs New York Team, CBS News, 23 Mar. 2026
There are also hot-button debates about the country’s decades-long ban on nuclear energy and its strict immigration policy.
—Lauren Kent, CNN Money, 23 Mar. 2026
See All Example Sentences for decades-long
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Brent Lang, Variety, 26 Mar. 2026
As Truell takes a Zoom call, the image of Caro—legendary biographer of Lyndon Johnson and Robert Moses, known for his exhaustive, decades-long research—looms over his shoulder, sweatered, bespectacled, writing intently.
—Allie Garfinkle, Fortune, 24 Mar. 2026
The 73-year-old Pitino and 63-year-old Bill Self coached against each other for only the second time in the Hall of Famers' decades-long careers, meeting for the first time in March Madness.
—Cbs New York Team, CBS News, 23 Mar. 2026
There are also hot-button debates about the country’s decades-long ban on nuclear energy and its strict immigration policy.
—Lauren Kent, CNN Money, 23 Mar. 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 29 Mar. 2026.
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