1) an urn or receptacle for keeping the bones of the dead
2) the funeral couch or bier on which the Jews carried their dead forth to burial
Part of Speech: noun feminine
Probably akin to the base of G4987; a funereal receptacle (urn, coffin), that is, (by analogy) a bier: - bier.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root σορός; click on the second column to search for that grammatical form of the root σορός; click on the third column to search for that word and grammatical form; click on the total to search for the root σορός.