An overcoat is a type of long coat intended to be worn as the outermost garment, which usually extends below the knee. Overcoats are most commonly used in winter when warmth is more important.
They are sometimes confused with or referred to as topcoats, which are shorter and end at or above the knees. Topcoats and overcoats together are known as outercoats. Unlike overcoats, topcoats are usually made from lighter weight cloth such as gabardine or covert, while overcoats are made from heavier cloth or fur.