Definition of palls:
(n) :
A heavy cloth laid over a coffin or tomb; a shroud laid over a corpse.
(n) :
(figuratively) Something that covers or surrounds like a cloak; in particular, a cloud of dust, smoke, etc., or a feeling of fear, gloom, or suspicion.
(v) :
(transitive) To cloak or cover with, or as if with, a pall.
(v) :
(transitive) To make vapid or insipid; to make lifeless or spiritless; to dull, to weaken.
(v) :
(intransitive) To become dull, insipid, tasteless, or vapid; to lose life, spirit, strength, or taste.
(n) :
Senses relating to cloth.