overspill
noun
over·spill ˈō-vər-ˌspil 
1
: the act or an instance of spilling over
2
chiefly British : the movement of excess urban population into less crowded areas
Example Sentences
an overspill into nearby towns a new town built to absorb London's overspill
Recent Examples on the Web The region of Al Wathba is home to a beautiful oasis-like wetland reserve created, so the story goes, by an overspill from a water treatment facility. 
Barry Neild, CNN, 23 June 2022 The room and the overspill viewing area in the lobby were at capacity. Nicole Carr, ProPublica, 16 June 2022 The zoonotic origin of SARS-CoV-1 has been firmly established by research that also showed that the bat sarbecoviruses pose a clear and present danger of pandemic overspill from bats to humans. Stephan Lewandowsky, Scientific American, 16 Feb. 2022 To my right, a frozen waterfall of black lava paved a steep slope—apparently, this was overspill from a lava field farther uphill. Heidi Julavit, The New Yorker, 16 Aug. 2021 Broemmer was also responsible for overseeing the construction of an overspill hospital in an exhibition center in Berlin during the first wave of the pandemic last spring, which cost around $40 million but has not taken in a single patient. Washington Post, 12 Dec. 2020 That is unlikely to help much, since courts would still require overspill space for observers and jury deliberations. The Economist, 11 June 2020 Enterprise customers – big firms that use external office space for staffing overspill – might also chose to bring more of their employees back in-house, notes the Fitch ratings agency. Chris Bryant | Bloomberg, Washington Post, 15 Aug. 2019 Arewa, a local term for the northern part of Nigeria, could not evade the global overspill of the #MeToo movement that had taken off from the United States. Fakhrriyyah Hashim, Quartz Africa, 22 July 2019 See More
Barry Neild, CNN, 23 June 2022 The room and the overspill viewing area in the lobby were at capacity. Nicole Carr, ProPublica, 16 June 2022 The zoonotic origin of SARS-CoV-1 has been firmly established by research that also showed that the bat sarbecoviruses pose a clear and present danger of pandemic overspill from bats to humans. Stephan Lewandowsky, Scientific American, 16 Feb. 2022 To my right, a frozen waterfall of black lava paved a steep slope—apparently, this was overspill from a lava field farther uphill. Heidi Julavit, The New Yorker, 16 Aug. 2021 Broemmer was also responsible for overseeing the construction of an overspill hospital in an exhibition center in Berlin during the first wave of the pandemic last spring, which cost around $40 million but has not taken in a single patient. Washington Post, 12 Dec. 2020 That is unlikely to help much, since courts would still require overspill space for observers and jury deliberations. The Economist, 11 June 2020 Enterprise customers – big firms that use external office space for staffing overspill – might also chose to bring more of their employees back in-house, notes the Fitch ratings agency. Chris Bryant | Bloomberg, Washington Post, 15 Aug. 2019 Arewa, a local term for the northern part of Nigeria, could not evade the global overspill of the #MeToo movement that had taken off from the United States. Fakhrriyyah Hashim, Quartz Africa, 22 July 2019 See More Word History
First Known Use
1884, in the meaning defined at sense 1