The term 'more POSH' can be defined by five crossword solutions: FANCIER (7 letters), ritzier (7 letters), swanker (7 letters), tonier (6 letters), and swankier (8 letters). FANCIER means more elegant or stylish, while ritzier implies a luxurious level of elegance. Swanker is a more extreme version of swanky, which means fashionable and stylish. Tonier is a more sophisticated version of trendy, and swankier is an even higher level of sophistication than swanky. All of these words describe a higher level of class and sophistication than the term 'POSH'.