Aeronautics. an uncontrolled or rough landing by an aircraft or spacecraft, usually resulting in damage.
Economics. an economic downturn or recession after a period of strong demand and expansion.
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British Dictionary definitions for hard landing
a landing by a rocket or spacecraft in which the vehicle is destroyed on impact
a sharp fall into recession following a sustained period of economic growth
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012