serge
n. C / U C2 Proficiency US //ˈsɝdʒ// UK //sˈɜːdʒ// serge
n. a strong, heavy fabric with diagonal lines on the surface, often used for making uniforms or suits.
n. a durable, twilled fabric with a smooth, clear surface and diagonal ribs on both sides, typically made of wool or wool blends.
The school uniform is made of thick blue serge.
He wore a heavy serge suit that looked uncomfortable in the summer heat but was built to last for years.
The tailor recommended a fine wool serge for the trousers, noting that its diagonal weave provides superior durability and resistance to wrinkling compared to plain-woven fabrics.
Usage
Uncountable when referring to the material in general; countable when referring to specific varieties or types of the fabric.