What is the meaning of ẞ?

Apothecary symbol for half.

Occasionally used in loanwords from German.

A ligature representing <ss> in italic text.

A letter of the Central Franconian alphabet (German-based), written in the Latin script.

A letter of the German alphabet, called Eszett or scharfes S and written in the Latin script; a German letter based on a ligature of ſ (long s) and z.

A letter formerly used to represent the sound /s/, now replaced by s.

A ligature representing <ss>.

Source: wiktionary.org