free fall
    n 1: the ideal falling motion of something subject only to a
         gravitational field
    2: a sudden sharp decrease in some quantity; "a drop of 57
       points on the Dow Jones index"; "there was a drop in pressure
       in the pulmonary artery"; "a dip in prices"; "when that
       became known the price of their stock went into free fall"
       [syn: drop, dip, fall, free fall]