#1 lurk v. [skulk] lie in wait, lie in ambush, behave in a sneaky and secretive manner. wn
#2 lurk v. [loiter, lounge, footle, lollygag, loaf, lallygag, hang around, mess about, tarry, linger, mill about, mill around] be about; "The high school students like to loiter in the Central Square"; "Who is this man that is hanging around the department?". wn
#3 lurk v. [ambush, scupper, bushwhack, waylay, ambuscade, lie in wait] wait in hiding to attack. wn
vizzz