1.  master (of a house, shop, etc.)
2.  husband
3.  sir;  boss;  master;  governor
used to address a male patron, customer, or person of high status
4.  patron of a mistress, geisha, bar or nightclub hostess;  sugar daddy
5.  alms;  almsgiving;  almsgiver
orig. meaning; usu. written as 檀那