Wiktionary
sport jacket
alt. A tailored jacket that is not part of a suit; especially one of a sturdy fabric originally designed for outdoor sports. n. A tailored jacket that is not part of a suit; especially one of a sturdy fabric originally designed for outdoor sports.
WordNet
sport jacket
n. lightweight single-breasted jacket; often striped in the colors of a club or school [syn: blazer, sport coat, sports jacket, sports coat]