chino
n. C / Un. a type of strong cotton cloth used to make trousers. It is also the name for the trousers themselves, which are usually light brown and look a bit more formal than jeans.
n. a durable, twilled cotton fabric, or trousers made from this material. Typically associated with a 'smart-casual' dress code and most frequently appearing in a light brown or khaki shade.
He wore a pair of blue chinos to the office.
Since the wedding had a relaxed dress code, he decided to wear tan chinos and a linen shirt instead of a suit.
The popularity of the chino as a staple of menswear originated in military uniforms, where the fabric's durability and neutral tones provided both utility and a professional appearance.
When referring to the garment, it is often used in the plural ('chinos') or with the phrase 'a pair of'.