Noun

(-)

(label) The physics of light and vision.

The light-related aspects of a device.

*{{quote-magazine, year=2013, month=September-October, author=(Henry Petroski)

, magazine=(American Scientist), title= The Evolution of Eyeglasses , passage=Digging deeper, the invention of eyeglasses is an elaboration of the more fundamental development of optics technology. The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone,

(label) Perception, image, public relations.

* 2007 January 1, (Mark Steyn), " Blowing a 'hinge moment' of history", in (The Jerusalem Post) :

; if you have to have victims' loved ones present, go for the widows and photogenic orphans rather than Moqtada's boys.

English plurals

Noun

The act of interfering with something, or something that interferes.

(sports) The illegal obstruction of an opponent in some ball games.

They were glued to the TV, as the referee called out a fifteen yard penalty for interference .

(physics) An effect caused by the superposition of two systems of waves, such as a distortion on a broadcast signal due to atmospheric or other effects.

They wanted to watch the game on TV, but there was too much interference to even make out the score on the tiny screen.

(US, legal) In United States patent law, an inter partes proceeding to determine the priority issues of multiple patent applications; a priority contest.

(chess) The interruption of the line between an attacked piece and its defender by sacrificially interposing a piece.