Greatcoat
/ˈɡreɪtkəʊt/
Definition 1 of 1
Pro Tip 1/3Weather Dependent
Used when discussing cold weather gear, not suitable for warm climates or seasons. 
In the Russian winter, a greatcoat is essential.
Pro Tip 2/3Historical Garment
Associated with historical military uniforms, conjures an image of old-fashioned or formal attire. 
Soldiers in the 19th century commonly wore greatcoats.
Pro Tip 3/3Protective Outerwear
Emphasizes protection from cold, often implying a heavier and more durable coat than a standard overcoat. 
His greatcoat shielded him from the biting wind.