piccalilli Syllabification: (pic·ca·lil·li)Pronunciation: /ˈpikəˌlilē/Definition of piccalilli noun (plural piccalillies or piccalillis) a relish of chopped vegetables, mustard, and hot spices. Origin: mid 18th century: probably from a blend of pickle and chiliSpell piccalilli with a double c, a single l, and then a double l.piccalilli in other Oxford dictionaries Definition of piccalilli in the British & World English dictionary