overcoat

Etymology

over- + coat

noun

1. A heavy garment worn over other clothes, for protection from cold or weather.
   Men that I knew around Wapatomac didn't wear high, shiny plug hats, nor yeller spring overcoats, nor carry canes with ivory heads as big as a catboat's anchor, as you might say. 1913, Joseph C. Lincoln, chapter 10, in Mr. Pratt's Patients
   ‘It's rather like a beautiful Inverness cloak one has inherited. Much too good to hide away, so one wears it instead of an overcoat and pretends it's an amusing new fashion.’ 1963, Margery Allingham, chapter 5, in The China Governess

verb

1. (transitive) To apply an exterior coating to.
   One method is to overcoat the fiber with Teflon AF, an amorphous Teflon that transmits over most of sapphire fiber's transmission range. 2004, James A. Harrington, Infrared Fibers and Their Applications, page 128