Synonyms: dip, drop, fall, free fall
Definition: a sudden sharp decrease in some quantity
Usage: 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
Synonyms: free fall
Definition: the ideal falling motion of something subject only to a gravitational field
Definition: a free and rapid descent by the force of gravity
Usage: it was a miracle that he survived the drop from that height