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cos

1 American  
[kos, kaws] / kɒs, kɔs /

noun

  1. romaine.

cos 2 American  

abbreviation

  1. Trigonometry, Mathematics. cosine.

cos. 3 American  

abbreviation

  1. companies.

  2. consul.

  3. consulship.

  4. counties.

C.O.S. 4 American  
Or c.o.s.

abbreviation

  1. cash on shipment.

cos 1 British  
/ kɒs /

noun

  1. Usual US and Canadian name: romaine.  a variety of lettuce with a long slender head and crisp leaves Compare cabbage lettuce

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
cos 2 British  
/ kɒz /

abbreviation

  1. cosine

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
COS 3 British  

abbreviation

  1. Chief of Staff

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cos 4 British  
/ kɒs /

noun

  1. a variant spelling of Kos

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
cos Scientific  

  1. Abbreviation of cosine

Etymology

Origin of cos

1690–1700; after Kos, where it originated

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.