- free fall - the ideal falling motion of something subject only to a gravitational field
--1 is a kind of drop, fall
- drop, dip, fall, free fall - 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"
--2 is a kind of decrease, decrement
--2 has particulars: correction; voltage drop - drop, dip, fall, free fall - 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"