cos

¹ American  

[kos, kaws] / kɒs, kɔs /

noun

1. romaine.

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cos ² American  

abbreviation

1. Trigonometry, Mathematics. cosine.

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cos. ³ American  

abbreviation

1. companies.

2. consul.

3. consulship.

4. counties.

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C.O.S. ⁴ American  

Or c.o.s.

abbreviation

1. cash on shipment.

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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

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cos ² British  

/ kɒz /

abbreviation

1. cosine

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COS ³ British  

abbreviation

1. Chief of Staff

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Cos ⁴ British  

/ kɒs /

noun

1. a variant spelling of Kos

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cos Scientific  

1. Abbreviation of cosine

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Etymology

Origin of cos

1690–1700; after Kos, where it originated

Example Sentences

"I just started stuffing cheese in my mouth cos I can't stop grinning. Isn't it funny? I was so nervous when Claudia squeezed my shoulder blade, and now I just love being a traitor."

From BBC • Oct. 22, 2025

He said he was with Annie when she died, a moment referenced in the song with the line: "I stayed all night till you left this life cos that's just love."

From BBC • Nov. 19, 2024

In brief, the TerS subunit initiates packaging when it encounters a specific site called cos in the genome.

From Science Daily • Nov. 21, 2023

This makes θ = 180º , and cos 180º = –1 ; therefore, W is negative.

From Textbooks • Aug. 12, 2015

To our left were the other bridges of Manhattan, arrayed against each other like alternating sin and cos waves, carrying a smattering of late-night trucks whose tops trailed mist.

From "It’s Kind of a Funny Story" by Ned Vizzini