blazer

This garment occupies a middle ground between a formal suit jacket and a casual sport coat. It is characterized by a relaxed structure, often lacking the rigid padding of a business suit, which makes it suitable for smart-casual settings where a full suit would be too stiff but a sweater would be too informal.

In institutional contexts, such as British schools or rowing clubs, the term refers to a specific uniform piece. These versions are typically more vibrant in color and feature a distinctive crest or emblem, serving as a visual marker of membership or rank within a specific organization.