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
Away from the cameras, Matt and Luciana have remained committed to their decades-long romance, including seeing each other in the middle of projects, attending red carpet events and getting matching tattoos.
—Jessica Booth, PEOPLE, 16 Jan. 2026
Beyond design, the project continues a decades-long relationship between Swatch and the Guggenheim.
—Renan Botelho, Footwear News, 15 Jan. 2026
Last year, Turkey reached a historic turning point in its decades-long conflict with militants of the Kurdistan Workers’ Party (PKK) after the group renounced violence and ambitions to secede.
—Jeremy Diamond, CNN Money, 14 Jan. 2026
The 10-acre community park, which will have playgrounds, picnic areas and community spaces, was part of a decades-long effort to repair damage after the city razed homes to build parking lots at Fair Park, a move legacy residents cite as emblematic of long-standing underinvestment.
—Devyani Chhetri, Dallas Morning News, 14 Jan. 2026
See All Example Sentences for decades-long
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Jessica Booth, PEOPLE, 16 Jan. 2026
Beyond design, the project continues a decades-long relationship between Swatch and the Guggenheim.
—Renan Botelho, Footwear News, 15 Jan. 2026
Last year, Turkey reached a historic turning point in its decades-long conflict with militants of the Kurdistan Workers’ Party (PKK) after the group renounced violence and ambitions to secede.
—Jeremy Diamond, CNN Money, 14 Jan. 2026
The 10-acre community park, which will have playgrounds, picnic areas and community spaces, was part of a decades-long effort to repair damage after the city razed homes to build parking lots at Fair Park, a move legacy residents cite as emblematic of long-standing underinvestment.
—Devyani Chhetri, Dallas Morning News, 14 Jan. 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 21 Jan. 2026.
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