sec·​tor | \ ˈsek-tər How to pronounce sector (audio) , -ˌtȯr \

Definition of sector

 (Entry 1 of 2)

1a : a geometric figure bounded by two radii and the included arc of a circle
b(1) : a subdivision of a defensive military position
(2) : a portion of a military front or area of operation
c : an area or portion resembling a sector bilingual sector of town— David Kleinberg
d : a sociological, economic, or political subdivision of society cooperation between the public and private sectors— Peter Chapman
2 : a mathematical instrument consisting of two rulers connected at one end by a joint and marked with several scales
3 : a subdivision of a track on a computer disk


sec·​tor | \ ˈsek-tər How to pronounce sector (audio) \
sectored; sectoring\ ˈsek-​t(ə-​)riŋ How to pronounce sector (audio) \

Definition of sector (Entry 2 of 2)

transitive verb

: to divide into or furnish with sectors

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Other Words from sector


sectoral \ ˈsek-​t(ə-​)rəl \ adjective

Examples of sector in a Sentence

Noun He was assigned to the northern sector. Data is stored on the disk in 512-byte sectors.
Recent Examples on the Web: Noun And that might be just in time to save a sector from over-hype, a crypto collapse, and massive over-saturation as everyone’s Microsoft Paint juvenilia floods into the NFT markets. John Koetsier, Forbes, 16 June 2021 The yield on the benchmark 10-year U.S. Treasury note settled at 1.569% on Wednesday while the real-estate sector of the S&P 500 has a dividend yield of 2.6%. Karen Langley, WSJ, 16 June 2021 During his years in power, Netanyahu oversaw a flourishing economy, led by a booming high-tech sector, and made Israel a world leader in coronavirus vaccinations—two unequivocal accomplishments. Ruth Margalit, The New Yorker, 13 June 2021 Germany, its largest economy, is pouring $10 billion into green hydrogen projects to stake its claim in a rapidly growing sector. Ciara Nugent, Time, 10 June 2021 When Spencer took over the gaming sector of Microsoft after the 2013 launch of the Xbox One, Choudry had a proposal. Washington Post, 10 June 2021 While consolidation is expected to continue and even accelerate, there will always be a healthy community bank sector in Texas, said Texas Capital’s Holmes. Natalie Walters, Dallas News, 10 June 2021 In the race to transition a road transport sector responsible for roughly one-fifth of its carbon footprint to cleaner cars and trucks, the EU has taken an early lead over the United States. Christiaan Hetzner, Fortune, 9 June 2021 The survey, conducted in April, focused on the middle market sector of the economy, which, as the name suggests, encompasses firms that are larger than small businesses yet not as big as the most powerful corporations with household names. Matt Egan, CNN, 9 June 2021 Recent Examples on the Web: Verb The country has lost over 900,000 jobs since the start of the pandemic, with women, young people and the services sector the most damaged. Alessandra Migliaccio, Fortune, 30 Apr. 2021 Hundreds of thousands of students from overseas have made the Australian universities sector one of the nation's biggest earners of foreign currency. Rod Mcguirk, Star Tribune, 7 Oct. 2020 The last few days saw hotels, resorts, and cruise lines sector outperform information technology by enough to break a long-lasting trend. Andrew Stuttaford, National Review, 11 Sep. 2020 The recent gains led RBC Capital Markets analyst Steven Arthur to downgrade his rating to sector perform from outperform Friday. Fortune, 31 May 2020 The recent gains led RBC Capital Markets analyst Steven Arthur to downgrade his rating to sector perform from outperform Friday. Sandrine Rastello,, 31 May 2020 The professional and business services sector lost 6,900 jobs; the next biggest losses were 1,700 in manufacturing and 1,600 in finance. Mark Williams,, 6 Mar. 2020 Network planning is basically about which sectors an airline will fly in, and at what frequency. Niharika Sharma, Quartz India, 6 Feb. 2020 The information and financial activities sectors both lost about 1,000 jobs. Pioneer Press, Twin Cities, 14 Nov. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sector.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of sector


1570, in the meaning defined at sense 1a


1884, in the meaning defined above

History and Etymology for sector


Late Latin, from Latin, cutter, from secare to cut — more at saw

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Statistics for sector

Last Updated

18 Jun 2021

Cite this Entry

“Sector.” Dictionary, Merriam-Webster, Accessed 25 Jun. 2021.

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More Definitions for sector



English Language Learners Definition of sector

: an area of an economy : a part of an economy that includes certain kinds of jobs
: an area for which someone (such as a military commander) is responsible
computers : one of the parts that a computer disk is divided into


sec·​tor | \ ˈsek-tər How to pronounce sector (audio) \

Kids Definition of sector

: a part of an area or of a sphere of activity the industrial sector of the economy


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