Definition: A magic potion for any purpose.
Definition: A potion, charm, or drug supposed to cause the person taking it to fall in love, usually with some specific person.
1. Tell me now, fairy as you are – can't you give me a charm, or a philter, or something of that sort, to make me a handsome man ? " — Jane Eyre, Charlotte Bront
2. Mariamne had told him it was a love philter and promised a large reward if he would get me to drink it without my knowledge. — The Four Wise Men , Michel Tournier, Ralph Manheim