[oast] n [ME ost, fr. OE ast; akin to MD eest kiln, L aestus heat, aestas summer--more at edify] (bef. 12c): a usu. conical kiln used for drying hops, malt, or tobacco--called also oasthouse
OAST
Meaning of OAST in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012