noun one who, or that which, butts.
2. butter ·vt to cover or spread with butter.
3. butter ·vt to increase, as stakes, at every throw or every game.
4. butter ·noun an oily, unctuous substance obtained from cream or milk by churning.
5. butter ·noun any substance resembling butter in degree of consistence, or other qualities, especially, in old chemistry, the chlorides, as butter of antimony, sesquichloride of antimony; also, certain concrete fat oils remaining nearly solid at ordinary temperatures, as butter of cacao, vegetable butter, shea butter.