WAFER

[noun] [C] - a very thin dry biscuit which is often sweet and flavouredSee picture: Desserts(specialized) A wafer is also a very thin round piece of dry bread which the priest gives to people to eat during Holy Communion (= a Christian religious ceremony).Something that is wafer-thin is extremely thin.The rooms were divided only by a wafer-thin partition.A wafer biscuit is a light sweet biscuit slightly thicker than a wafer with a creamy filling.See picture: Biscuits