All 7 Uses

venom
in
Harry Potter (#2) and the Chamber of Secrets
(Edited)

Snape shot a look of pure venom at Harry and Ron as he allowed himself to be swept out of his office, leaving them alone with Professor McGonagall, who was still eyeing them like a wrathful eagle.
p. 82.2 *

venom = intense feelings of hatred or anger
Four to a tray — there is a large supply of pots here — compost in the sacks over there — and be careful of the Venomous Tentacula, it's teething.
p. 93.7

venomous = capable of injecting poison with a bite
It was a voice, a voice to chill the bone marrow, a voice of breathtaking, ice-cold venom.
p. 120.6

venom = harmful intent
But the thing is, it's in the Restricted Section of the library, so I need a teacher to sign for it — I'm sure it would help me understand what you say in Gadding with Ghouls about slow-acting venoms.
p. 162.9

venoms = poisons created by living creatures
Its methods of killing are most wondrous, for aside from its deadly and venomous fangs, the Basilisk has a murderous stare, and all who are fixed with the beam of its eye shall suffer instant death.
p. 290.5 *

venomous = capable of injecting poison with a bite
He could see the vast, bloody eye sockets, see the mouth stretching wide, wide enough to swallow him whole, lined with fangs long as his sword, thin, glittering, venomous.
p. 320.3
The basilisk venom had burned a sizzling hole right through it.
p. 322.7

venom = poison

Definitions:

(1) (venom as in: snake venom)
poison created by some insects and animals such as snakes
(2) (venom as in: jealousy-fueled venom)
intense feelings of hatred or anger
(3) (meaning too rare to warrant focus)