verb (used without object), free-fell, free-fallen, free-falling.
(of parachutists) to descend initially, as for a designated interval, in a free fall: The jumpers were required to free-fall for eight seconds.
denoting or suggesting a free fall: a free-fall recession.
free fall ( defs 1, 2 ). Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin & History

also free fall, free-fall, 1919, originally of parachutists, from free + fall (v.).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary

free fall definition

In physics, the motion of a body being acted upon only by gravity. A satellite in orbit is in free fall, as is a skydiver (if we neglect the effects of air resistance).

Note: During free fall, objects are said to be weightless.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
It won't help those of us who are already in freefall, but it will end an
  abusive cycle.
It probably depends on the country, but many lion populations are in freefall.
They spread their arms and legs in freefall, deploy a parachute about
  two-thirds of the way down, and land safely on the ground.
The last time it happened, the market for trucks went into freefall.
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