The term 'set down' can be defined as to PUT something in a particular PLACE or position. This term can be expressed in many different ways, as evidenced by the crossword solutions given. These solutions include 'FORMULATE' (9 letters), 'LIGHT' (5 letters), 'lain' (4 letters), 'LAY' (3 letters), 'PEN' (3 letters), 'PUT' (3 letters), 'ALIT' (4 letters), 'laid' (4 letters), 'LAND' (4 letters), 'PLACE' (5 letters), 'PLANK' (5 letters), 'POSIT' (5 letters), 'WRITE' (5 letters), 'wrote' (5 letters), 'ASCRIBE' (7 letters), 'written' (7 letters), and 'takedown' (8 letters). All of these words can be used to describe the act of setting something down, either literally or figuratively.