OAST (O. Eng. dst, cf. Dutch eest, " kiln "; the Teutonic root is aidh- " to burn"; the pre-Teutonic idh- is seen in Lat. aestus, " heat," aestas, " summer," Gr. aWos, "burning heat"), a kiln, particularly one used for drying hops; the word usually appears in the term " oast-house," a building containing several of such kilns (see HOP). " Oast " is also sometimes used of a kiln for drying tobacco.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)