Definitions of buttery:

• noun:   a teashop where students in British universities can purchase light meals
• noun:   a small storeroom for storing foods or wines
• adjective:   unpleasantly and excessively suave or ingratiating in manner or speech

  Example: "Buttery praise"

• adjective:   resembling or containing or spread with butter

  Example: "A rich buttery cake"

• name:  A surname (very rare: popularity rank in the U.S.: #21694)