#1 heighten v. [rise] become more extreme; "The tension heightened". wn
#2 heighten v. make more extreme; raise in quantity, degree, or intensity; "heightened interest". wn
#3 heighten v. [enhance, raise] increase; "This will enhance your enjoyment"; "heighten the tension". wn
#4 heighten v. increase the height of; "The athletes kept jumping over the steadily heightened bars". wn
#5 heighten v. [sharpen] make (one's senses) more acute; "This drug will sharpen your vision". wn
vizzz