An Encylopedia Britannica Company

fiber

fiber (US) noun
or British fibre /ˈfaɪbɚ/
plural fibers
fiber (US)
noun
or British fibre /ˈfaɪbɚ/
plural fibers
Britannica Dictionary definition of FIBER
[noncount] : plant material that cannot be digested but that helps you to digest other food
: a thin thread of natural or artificial material that can be used to make cloth, paper, etc.
[count]
[noncount]
: material (such as cloth) that is made from thin threads : something made of fibers
[count]
[noncount]
[count] : a long, thin piece of material that forms a type of tissue in your body
[noncount] formal : strength or toughness of character

with every fiber of your being

: with all of your effort or desire