Adjective buttery has 2 senses
- buttery, fulsome, oily, oleaginous, smarmy, unctuous - unpleasantly and excessively suave or ingratiating in manner or speech; "buttery praise"; "gave him a fulsome introduction"; "an oily sycophantic press agent"; "oleaginous hypocrisy"; "smarmy self-importance"; "the unctuous Uriah Heep"
Antonym:  sincere (indirect, via insincere)
 - buttery - resembling or containing or spread with butter; "a rich buttery cake"
Antonyms:  nonfat, fat-free, fatless (indirect, via fatty)
 
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Noun buttery has 2 senses
- pantry, larder, buttery - a small storeroom for storing foods or wines
--1 is a kind of storeroom, storage room, stowage
--1 has particulars: stillroom, still room
 - buttery - a teashop where students in British universities can purchase light meals
--2 is a kind of teashop, teahouse, tearoom, tea parlor, tea parlour
 
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