the use of aerodynamic drag to slow spacecraft re-entering the atmosphere
the use of airbrakes to retard flying vehicles or objects
the use of a parachute or reversed thrust to decelerate an aircraft during landing
Read more in this article about some frequently asked questions and fun facts related to our definitions.
“UFOs?” What bizarre event spawned the phrase “flying saucer?”
There’s a fresh UFO hullabaloo, and that provides the perfect opportunity to encounter the origin of “flying saucer” and “UFO.” There are no alien autopsies, abductions or crop circles in these stories, but there is no shortage of weirdness. First, here’s the latest extraterrestrial extravaganza. A group of retired Air Force members and UFO researchers held a press conference claiming that aliens not only monitor, …
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