how so adverb 3phrase 2 adverb3 •Why; For what reason.Yet how so ere I love, I must be wife. — 1598 •How; In what way; howeverBut how so thys money was lent or gyded, at thys daye the cheste remayneth in the chamber of London, wythout money or pledges for the same. — 1809 •Used as an intensifier.The king shall joy in thy strength, O Lord ; and in thy salvation how so shall he rejoice! — 1771 phrase2 •How?; In what way?The city of Melbourne has much more culture than Sydney. ― How so? •Why?; For what reason?I'm feeling really depressed. ― How so?