fibre opticsfi·bre op·tics /ˌfaɪbər ˈɒptɪks-ˈɑːp-/ British EnglishBrE, fiber optics American EnglishAmE noun [uncountableU]TELECOMMUNICATIONS the process of using very thin threads of glass or plastic to carry information in the form of light, especially on telephone lines
—fibre optic adjectiveadj [only before a noun]high speed fibre optic cables