also: オーバコート
A heavy coat worn over other clothes for warmth, typically in cold weather. The loanword is used in the same sense as English 'overcoat'.
In winter, it's cold without an overcoat.
It was cold, so I put on my overcoat before going out.
As soon as I entered the room, I took off my overcoat.
He had an overcoat draped over his shoulders.