'Emission' definitions:

Definition of 'emission'

From: WordNet
noun
The act of emitting; causing to flow forth [syn: emission, emanation]
noun
A substance that is emitted or released [syn: discharge, emission]
noun
The release of electrons from parent atoms
noun
Any of several bodily processes by which substances go out of the body; "the discharge of pus" [syn: discharge, emission, expelling]
noun
The occurrence of a flow of water (as from a pipe)

Definition of 'Emission'

From: GCIDE
  • Emission \E*mis"sion\, n. [L. emissio: cf. F. ['e]mission. See Emit.]
  • 1. The act of sending or throwing out; the act of sending forth or putting into circulation; issue; as, the emission of light from the sun; the emission of heat from a fire; the emission of bank notes. [1913 Webster]
  • 2. That which is sent out, issued, or put in circulation at one time; issue; as, the emission was mostly blood. [1913 Webster]
  • Emission theory (Physics), the theory of Newton, regarding light as consisting of emitted particles or corpuscles. See Corpuscular theory, under Corpuscular. [1913 Webster]