ˈfaɪbə n. (US fiber) 1 Biol.
any of
the threads or filaments forming
animal or
vegetable tissue and textile substances. 2 a
piece of
glass in the
form of a
thread. 3 a a
substance formed of fibres. b a substance
that can be
spun,
woven, or felted. 4 the
structure,
grain, or
character of
something (lacks
moral fibre). 5
dietary material that is resistant to the
action of
digestive enzymes;
roughage. øfibre
optics optics employing
thin glass fibres, usu.
for the
transmission of
light,
esp. modulated to
carry signals. øøfibred adj. (also in comb.). fibreless adj. fibriform adj. [ME f. F f. L fibra]