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}]