Word forms: plural optical fibresregional note: in AM, use optical fiber
variable noun
An optical fibre is a very thin thread of glass inside a protective coating. Optical fibres are used to carry information in the form of light.
Nearly every long-distance call made in Britain now travels on optical fibre insteadof cable.
...an optical fibre network to which every home and office can be connected.
optical fibre in British English
noun
a communications cable consisting of a thin glass fibre in a protective sheath. Light transmitted along the fibre may be modulated with vision, sound, or data signals
See also fibre optics
Examples of 'optical fibre' in a sentence
optical fibre
The other essential for the cloud to get up to full working speed is a network based on optical fibres.
Times, Sunday Times (2010)
But optical fibre networks could make the internet 15 times faster.