#1 open up v. cause to open or to become open; "Mary opened the car door". wn
#2 open up v. become available; "an opportunity opened up". wn
#3 open up v. make available; "This opens up new possibilities". wn
#4 open up v. open up an area or prepare a way; "She pioneered a graduate program for women students". wn
#5 open up v. start to operate or function or cause to start operating or functioning; "open a business". wn
vizzz