(~s, pouncing, ~d)
1.
If someone ~s on you, they come up towards you suddenly and take hold of you.
He ~d on the photographer, beat him up and smashed his camera...
Fraud squad officers had bugged the phone and were ready to ~.
VERB: V on/upon n, V
2.
If someone ~s on something such as a mistake, they quickly draw attention to it, usually in order to gain an advantage for themselves or to prove that they are right.
The Democrats were ready to ~ on any Republican failings or mistakes...
VERB: V on/upon n
3.
When an animal or bird ~s on something, it jumps on it and holds it, in order to kill it.
...like a tiger pouncing on its prey...
Before I could get the pigeon the cat ~d.
VERB: V on/upon n, V