Quote:
Originally Posted by
sega18 
So there is some fundamental difference between a suit jacket and a sport coat. Thanks for clarifying.
Also, what's the difference between a sport coat and a blazer? I tried to google it, but I couldn't find a straight answer. One person suggested that a blazer is a subset (or an element) of "sport coat".
There isn't necessarily a fundamental difference, but they are usually distinguishable and there are features characteristic of odd jackets. Patch pockets, double stitching, and more contrasting horn buttons, for examples.
A blazer is a single-color odd jacket that historically signified membership in a club or organization. Today, blazers are almost always blue odd jackets, often with golden buttons (but alternatively with plain horn or mother of pearl). A navy suit jacket made with a cloth of rougher texture and heavier weight can easily pass as a blazer and may, for all intents and purposes, be indistinguishable from one.