cos

cos

1. (trigonometry) cosine.
2. (international standards) ISO 639-2 & ISO 639-3 language code for Corsican.

• Wiktionary’s coverage of Corsican terms

English Wikipedia has an article on:

cos

Wikipedia

Clipping of cos lettuce, variously derived from the Greek island of Kos and from Arabic خس (ḵass, “lettuce”).

• (General American) IPA^(key): /kɑs/
• (Received Pronunciation) IPA^(key): /kɒs/

• Audio (US):

  (file)

• Rhymes: -ɒs

cos (plural coses)

1. (chiefly UK) Synonym of romaine lettuce, a long-leaved variety of lettuce.

• (Received Pronunciation) IPA^(key): /kɒz/; (unstressed) IPA^(key): /kəz/
• (General American) IPA^(key): /kʌz/; (unstressed) IPA^(key): /kəz/

cos

1. (UK, Ireland, South Africa, African-American Vernacular) Informal spelling of 'cause (“because”).
   • 2021, Isabel Waidner, Sterling Karat Gold, Peninsula Press, page 161:

     Taking the shortcut through the alleyway by the Jobcentre Plus, just cos I can, we arrive at my flat within minutes.

Clipping of cousin.

• IPA^(key): /kʌz/

cos (plural cosses)

1. (informal, African-American Vernacular) Alternative form of coz, cousin.

From co +‎ -s.

cos

1. plural of co

cos

1. (nonstandard) Belonging to co. Gender-neutral possessive determiner, grammatically equivalent to the gendered his and her and the singular their.
   • 1973, Michael Glenn, Richard Kunnes, Repression or Revolution?: Therapy in the United States Today, Harper Colophon Books, →ISBN, page 53:

     Psychiatrists are trained to try to impose the responsibility for a patient’s problem on the patient coself, rather than on cos environment.

   • 1975, Valida Davila, “A Child’s Sexual Bill of Rights”, in Bernhardt J. Hurwood, editor, The Whole Sex Catalogue, New York, N.Y.: Pinnacle Books, published 1976, →ISBN, page 287:

     WHEREAS a child’s sexuality is just as much a part of cos whole person from birth as the blood that flows in cos veins, making cos sexual rights inherent and inalienable

   • 1986, Ingrid Komar, Living the Dream: Twin Oaks Community 1979-1982, Louisa, Va.: Twin Oaks Community, →OCLC, page 355:

     Co absents coself from the Community for more than three weeks beyond the point of having made satisfactory arrangements with the Community with regard to cos absence.

• co's

cos (plural coses or cos)

1. Alternative form of coss, a traditional Nepali unit of distance.
   • 1857, Brian Houghton Hodgson, Selections from the Records of the Government of Bengal, No. XXVII: Papers Relative to the Colonization, Commerce, Physical Geography, &c., &c., of the Himalaya Mountains and Nepal, p. 22:

     The stages and distances are as follows:—Hitounda to Bhainsa Dobháng, 3½ cos; to Bhimphédy, 4 cos; to Tambakhâni, 3 cos; to Chitlong, 3 cos; to Thankot, 3 cos; to Káthmándú, 3 cos—Total, 19½ cos.

• cosmid

• CSO, OCS, OCs, OSC, SCO, SOC, SoC, Soc, Soc., soc, soc.

• cosu

From Vulgar Latin *cōsō, from Latin consuō. Compare Romanian coase, cos.

cos first-singular present indicative (third-person singular present indicative coasi or coase, past participle cusutã)

1. to sew

• coasiri/coasire
• cusut

Inherited from Old Catalan cors, from Latin corpus. Doublet of the borrowing corpus.

• IPA^(key): (Central, Balearic, Valencia)

• Audio:

  (file)

cos m (plural cossos)

1. body (physical structure of a human or animal)
2. body, corpse

   Synonym: cadàver

• “cos” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.

• “cos”, in Diccionari de la llengua catalana (in Catalan), second edition, Institute of Catalan Studies , 2007 April
• “cos”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2025.
• “cos” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.

This entry needs pronunciation information. If you are familiar with the IPA then please add some!

• Audio:

  (file)

cos

1. (ACG, informal) cosplay

   玩cos的人  ―  wán cos de rén  ―  someone who cosplays; cosplayer

2. (ACG, informal) cosplay costume

cos

1. (ACG, informal) to cosplay
2. (slang, by extension) LARP; To pretend to be something, or act as something

   cos共產主義／cos共产主义  ―  cos gòngchǎnzhǔyì  ―  LARP as a communist

• IPA^(key):

cos

1. alternative form of cosi

• “cos”, in Příruční slovník jazyka českého (in Czech), 1935–1957
• “cos”, in Slovník spisovného jazyka českého (in Czech), 1960–1971, 1989
• “cos”, in Internetová jazyková příručka (in Czech), 2008–2025

From Slovene kòš, from Proto-Slavic *košь.

cos m (plural cos)

1. basket

   Synonyms: gei, geùt, ceste

From contraction of preposition con (“with”) + masculine plural definite article os (“the”).

• IPA^(key): /ˈkoːs̺/
• Rhymes: -ʊs, -os
• Hyphenation: cos

cos m pl (masculine co, feminine coa, feminine plural coas)

1. with the

• “con”, in Dicionario da Real Academia Galega (in Galician), A Coruña: Royal Galician Academy, 2012–2025

• cois (Galway)

From Old Irish cos, from Proto-Celtic *koxsā (cf. Welsh coes), ultimately from Proto-Indo-European *koḱs-, whence also Latin coxa (“hip”).

• IPA^(key): /kosˠ/, /kɔsˠ/, /kɞsˠ/

cos f (genitive singular coise, nominative plural cosa)

1. foot
2. leg

• Dual: dhá chois

• Dinneen, Patrick S. (1904) “cos”, in Foclóir Gaeḋilge agus Béarla, 1st edition, Dublin: Irish Texts Society, page 185
• Ó Dónaill, Niall (1977) “cos”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN

• cosz (regional)

From co +‎ -s. Compare Polish coś and Slovincian cesz.

• IPA^(key): /ˈt͡sɔs/
• Rhymes: -ɔs
• Syllabification: cos

cos

1. indeterminate pronoun; something

• Stefan Ramułt (1893) “cos”, in Słownik języka pomorskiego czyli kaszubskiego (in Kashubian), page 18
• Eùgeniusz Gòłąbk (2011) “coś”, in Słownik Polsko-Kaszubski / Słowôrz Pòlskò-Kaszëbsczi‎
• “cos/cosz”, in Internetowi Słowôrz Kaszëbsczégò Jãzëka , Fundacja Kaszuby, 2022

From Proto-Italic *kōtis, from Proto-Indo-European *ḱeh₃- (“to sharpen”). Cognate with Latin catus (“clever, cunning”), cautēs (“pointed rock”), cuneus (“wedge”) and Ancient Greek κῶνος (kônos, “cone”).

• (Classical Latin) IPA^(key):
• (modern Italianate Ecclesiastical) IPA^(key):

cōs f (genitive cōtis); third declension

1. whetstone

Third-declension noun.

• cōtōria

• COS

cos

1. abbreviation of consul

• “cos”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “cos”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• "cos", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• “cos”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers
• “cos”, in William Smith, editor (1854, 1857), A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly

• cus, kis, kys, kysse, kesse

From Old English coss, from Proto-West Germanic *koss, from Proto-Germanic *kussaz. Forms with /i/, /u/ and /ɛ/ are influenced by Old English cyssan.

• IPA^(key): /kɔs/, /kus/, /kis/, /kɛs/

cos (plural cosses or cossen)

1. a kiss (action of kissing)

   Synonym: kissynge

• English: kiss
• Scots: kis
• Yola: kesse

• “cos, n.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.

Proto-Brythonic *kọs, from Latin cāseus.

cos

1. cheese
   • c. 1200, Latin-Old Cornish Glossary in British Library MS Cotton Vespasian A XIV, folio 10 recto:

     Caseus⹎ cos vel caus.

     Cheese. — cheese or cheese.

• Middle Cornish: kez, keas
  • Cornish: keus

• IPA^(key): /kos/

cos m

1. alternative form of coss

cos m

1. inflection of cop:
   1. oblique plural
   2. nominative singular

From Proto-Celtic *koxsā (cf. Welsh coes), ultimately from Proto-Indo-European *koḱs-. Cognate with Latin coxa (“hip”).

• IPA^(key):

cos f (genitive coise, nominative plural cossa)

1. foot
2. leg

• Irish: cos
• Manx: cass
• Scottish Gaelic: cas

• Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “cos”, in eDIL: Electronic Dictionary of the Irish Language

• (Lesser Poland):
  • (Goral):
    • (Żywiec) IPA^(key): /ˈt͡sɔs/

cos

1. (Żywiec) alternative form of coś

• Leon Rzeszowski (1891) “cos”, in “Spis wyrazów ludowych z okolic Żywca”, in Sprawozdania Komisyi Językowej Akademii Umiejętności, volume 4, Krakow: Drukarnia Uniwersytetu Jagiellońskiego, page 354

cos m pl (feminine plural cas)

1. (colloquial) contraction of com os (“with the (masculine plural)”)

• Rhymes: -os

cos

1. inflection of coase:
   1. first-person singular present indicative/subjunctive
   2. third-person plural present indicative

cos m pl

1. plural of co

Onomatopoeic.

• IPA^(key): /ˈd͡ʒos/

cos (definite accusative cosu, plural coslar)

1. (onomatopoeia) sizzle (the sound of water hitting a hot surface)

Clipping of cosplay, from English cosplay.

• IPA^(key): /ˈkos/

cos (definite accusative cosu, plural coslar)

1. abbreviation of cosplay

   O kadar Kalista cos yapmışsındır ama gelen soru "mavi mi"dir.

   When you went through the effort of doing a Kalista cosplay but all they do is ask "is it blue?".