Interference

n.	1.	The act or state of interfering; as, the stoppage of a machine by the interference of some of its parts; a meddlesome interference in the business of others.
	2.	(Physics) The mutual influence, under certain conditions, as from streams of light, or pulsations of sound, or, generally, two waves or vibrations of any kind, producing certain characteristic phenomena, as colored fringes, dark bands, or darkness, in the case of light, silence or increased intensity in sounds; neutralization or superposition of waves generally.
	3.	(Patent Law) The act or state of interfering, or of claiming a right to the same invention. Interference figures (Optics) the figures observed when certain sections of crystallized bodies are viewed in converging polarized light; thus, a section of a uniaxial crystal, cut normal to the vertical axis, shows a series of concentric colored rings with a single black cross; - so called because produced by the interference of luminous waves. Interference fringe (Optics) See Fringe.

Noun	1.	interference - a policy of intervening in the affairs of other countries Synonyms: intervention Antonyms: noninterference, nonintervention - a foreign policy of staying out of other countries' disputes
	2.	interference - the act of hindering or obstructing or impeding Synonyms: hindrance
	3.	interference - electrical or acoustic activity that can disturb communication Synonyms: noise, disturbance
	4.	interference - (American football) the act of obstructing someone's path with your body; "he threw a rolling block into the line backer" Synonyms: blocking, block
	5.	interference - any obstruction that impedes or is burdensome Synonyms: hindrance, preventative, preventive, encumbrance, incumbrance, hitch

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