blazer
US /ˈbleɪ.zɚ/
UK /ˈbleɪ.zɚ/

1.
a lightweight jacket, typically solid-colored, often worn as part of a uniform or for smart casual occasions
:
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He wore a navy blazer with khaki pants.
•
The school uniform includes a grey blazer.
a lightweight jacket, typically solid-colored, often worn as part of a uniform or for smart casual occasions