'painkiller' definitions:

Definition of 'painkiller'

From: WordNet
noun
A medicine used to relieve pain [syn: analgesic, anodyne, painkiller, pain pill]

Definition of 'painkiller'

From: GCIDE
  • painkiller \pain"kil`ler\ n. A medicine used in to relieve pain.
  • Syn: analgesic, anodyne, pain pill. [WordNet 1.5]