'Smelling salts' definitions:

Definition of 'smelling salts'

From: WordNet
noun
A pungent preparation of ammonium carbonate and perfume; sniffed as a stimulant to relieve faintness

Definition of 'Smelling salts'

From: GCIDE
  • Smelling salts \Smell"ing salts\ An aromatic preparation of carbonate of ammonia and, often, some scent, to avoid or relieve faintness, headache, or the like. [Webster 1913 Suppl.]