Cos

/kɔːz/

Meaning & Definition

noun

The trigonometric function cosine, which relates the angle of a right triangle to the ratio of the length of the adjacent side to the hypotenuse.

To calculate the adjacent side in a right triangle, you can use the cosine of the angle.

In mathematics, especially in trigonometry and geometry, 'cos' is often abbreviated from 'cosine'.

The value of cos(60 degrees) is 0.5.

abbreviation

A colloquial abbreviation for 'because', commonly used in informal contexts.

I couldn't go to the party, cos I was busy studying.

Used in casual speech to provide a reason or explanation.

She won't join us for dinner, cos she's on a diet.

An expression to give justification.

He said he'd be late, cos he missed the bus.

Abbreviation of 'because', used in informal contexts.

cos I love you

indicating that the speaker loves someone as a reason for an action.

just cos

meaning 'just because', often used to imply there is no particular reason.

cos of

indicating the reason or cause of something.

because

a conjunction used to introduce a clause explaining the reason for something.

since

used when referring to a point in the past.

used to indicate comparison or cause.

To express agreement or justification informally.

I'm going to skip class, cos it’s not important.

Indicating a casual or simplified reasoning.

He said no, cos he was busy.