to fall from a high level or position
Prices have plummeted.
by English_dictionary January 05, 2013
when a person jumps from a height of minimum 2 stories
Levi told Jeff to plummet when he broke the overhead in chem. class.
by the Chemistry kid May 06, 2004
to fall really fast straight down
susie just plummeted off that building and is laying in a bloody mass over there
by SN August 04, 2003