TOPCOAT
greatcoat, overcoat, topcoat
(noun) a heavy coat worn over clothes in winter
Source: WordNet® 3.1
Etymology
Noun
topcoat (plural topcoats)
A light overcoat.
A layer of paint or varnish etc. applied after the undercoat.
Verb
topcoat (third-person singular simple present topcoats, present participle topcoating, simple past and past participle topcoated)
(transitive) To apply a topcoat to.
Source: Wiktionary
Top"coat`, n.
Definition: An outer coat; an overcoat.
Source: Webster’s Unabridged Dictionary 1913 Edition