tertiary

adjective
ter·​tia·​ry | \ ˈtər-shē-ˌer-ē How to pronounce tertiary (audio) , -shə-rē How to pronounce tertiary (audio) \

Definition of tertiary

 (Entry 1 of 2)

1a : of third rank, importance, or value
b chiefly British : of, relating to, or being higher education
c : of, relating to, or constituting the third strongest of the three or four degrees of stress recognized by most linguists (such as the stress of the third syllable of basketball team)
2 capitalized : of, relating to, or being the first period of the Cenozoic era or the corresponding system of rocks marked by the formation of high mountains (such as the Alps, Caucasus, and Himalayas) and the dominance of mammals on land — see Geologic Time Table
3a : involving or resulting from the substitution of three atoms or groups a tertiary salt tertiary amine
b : being or containing a carbon atom having bonds to three other carbon atoms an acid containing a tertiary carbon tertiary alcohols
c : of, relating to, or being the normal folded structure of the coiled chain of a protein or of DNA or RNA
4 : occurring in or being a third stage: such as
a : being or relating to the recovery of oil and gas from old wells by means of the underground application of heat and chemicals
b : being or relating to the purification of wastewater by removal of fine particles, nitrates, and phosphates

tertiary

noun
plural tertiaries

Definition of tertiary (Entry 2 of 2)

1 [ Medieval Latin tertiarius, from Latin, of a third ] : a member of a monastic third order especially of lay people
2 capitalized : the Tertiary (see tertiary entry 1 sense 2) period or system of rocks

Examples of tertiary in a Sentence

Adjective

Bill Clinton … has passed through the tertiary and quaternary stages and is well on his way to millenary integrity. — Cullen Murphy, Atlantic, January/February 2003 A tertiary care doctor at a cushy academic medical center, a plastic surgeon, and a dentist in a Pleasantville suburb don't spend much time taking care of poor patients who lack basic insurance. — Siddhartha Mukherjee, New Republic, 17 Sept. 2001 The most learned philosopher knew little more. He had partially unveiled the face of Nature, but her immortal lineaments were still a wonder and a mystery. He might dissect, anatomise, and give names; but, not to speak of a final cause, causes in their secondary and tertiary grades were utterly unknown to him. — Mary Wollstonecraft Shelley, Frankenstein, 1818 Headaches often occur during the tertiary stage of the illness.
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Recent Examples on the Web: Adjective

One in nine Africans with a tertiary qualification lives in an OECD country, compared with one in 13 Latin Americans and one in 30 Asians. The Economist, "A booming population is putting strain on Africa’s universities," 8 Aug. 2019 The regulators moved quickly Wednesday to quash any questions related to any of the future licensure requirements that also are under consideration, such as changes to the rules for tertiary programs. Christine Sexton, sun-sentinel.com, "Florida regulators float new rules in hospital wars," 5 July 2019 However, club-level artists often still play shows in tertiary markets - that is, if there's a large club-sized venue in that market. Matt Wake, al.com, "Planned Huntsville music venue postpones shows," 20 June 2019 The show’s format presents songwriters as tertiary to the pop stars and producers who will record the songs; everything is done in ruthless service of the star and the hit. Carrie Battan, The New Yorker, "How “Songland” Tries and Fails to Honor the Songwriter," 11 June 2019 The coalition also is a good example of how the craft-brewing industry touches a variety of tertiary jobs, that's it’s not just brewers. Marc Bona, cleveland.com, "Beer Women Rock sets 5th annual fest," 7 June 2019 Secondary and tertiary employment has been generated by marketing and branding of both recreational and medical cannabis, complete with the sale of accessories. Devangshu Datta, Quartz India, "Legalising cannabis could be one solution to India’s agrarian distress," 30 May 2019 Even better was driving on the secondary and tertiary roads through farm country. Eric Bangeman, Ars Technica, "All SUV, all of the time: The Range Rover Sport reviewed," 12 July 2018 However, Mexico’s share of adults with tertiary education is 17 percent, the lowest among OECD countries. Gustavo A. Flores-macías, Washington Post, "Should the U.S. worry about meddling in Mexico’s July presidential race?," 29 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tertiary.' 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 tertiary

Adjective

circa 1656, in the meaning defined at sense 1a

Noun

circa 1550, in the meaning defined at sense 1

History and Etymology for tertiary

Adjective

Latin tertiarius of or containing a third, from tertius third

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More Definitions for tertiary

tertiary

adjective

English Language Learners Definition of tertiary

formal : third in order, importance, or value

tertiary

noun
ter·​tia·​ry | \ ˈtər-shē-ˌer-ē How to pronounce tertiary (audio) , ˈtər-shə-rē How to pronounce tertiary (audio) \
plural tertiaries

Medical Definition of tertiary

 (Entry 1 of 2)

2 : a lesion of tertiary syphilis

tertiary

adjective

Medical Definition of tertiary (Entry 2 of 2)

1 : of third rank, importance, or value
2a : involving or resulting from the substitution of three atoms or groups a tertiary salt
b : being or containing a carbon atom having bonds to three other carbon atoms an acid containing a tertiary carbon
c : of, relating to, or being the normal folded structure of the coiled chain of a protein or of a DNA or RNA — compare primary entry 1 sense 4, secondary sense 3
3 : occurring in or being a third stage tertiary lesions of syphilis
4 : providing tertiary care a tertiary medical center

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