Open English Wordnet
Nouns
(n)free fallthe ideal falling motion of something subject only to a gravitational field (n)drop, dip, fall, free falla 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”