(~s, ~ping, ~ped)
If you ~ on someone, you listen secretly to what they are saying.
The government illegally ~ped on his telephone conversations...
The housemaid ~ped from behind the kitchen door.
= listen in
VERB: V on n, V
~ping
...foreign electronic ~ping on army communications.
N-UNCOUNT
~per (~pers)
Modern technology enables ~pers to pick up conversations through windows or walls.
N-COUNT