A) to come down from a very high place, such as while climbing a mountain or flying in an airplane
B) the most painful part of most drug use
C) Nowhere near the same as "Dissent", like the moron in the first response would have us believe
"We hit a rough patch of weather on our descent, but we should make it home safely"
"There will be heavy snowfall during the descent, so make sure you keep an eye on your partners"
"Shit man, I took 4 tabs and drank 2 bottles of Robo last night and now Im on the descent. Can you get me a puke pan and some pillows?"
"Contrary to popular belief, DISSENT is on the ASCENT."