An obsolete form of lower-case s, written or printed as ſ. It was used in initial and medial but not final position in a word, and was generally abandoned in English-language printing shortly before 1800.
Definition of long s in US English:
long s
noun
An obsolete form of lower-case s, written or printed as ſ. It was used in initial and medial but not final position in a word, and was generally abandoned in English-language printing shortly before 1800.