What is the meaning of St.?

Alternative letter-case form of St., abbreviation of street.

Abbreviation of starší (Senior”, “[the] Elder): Sr.

Abbreviation of statt.

Abbreviation of stark.

Abbreviation of samtenging.

Abbreviation of stycke (piece) or stycken (pieces); similar to pc. or pcs.

Abbreviation of stor (large) or stora (the large).

Nonstandard spelling of S:t (m. Saint) or S:ta (f. Saint).

Source: wiktionary.org