(1) A fibrous surface, produced on a fabric or felt, in which part of the fibre is raised from the basic structure.
Note: Originally nap and pile were used synonymously, but the present trend of using the two terms for different concepts is to be encouraged as providing a means of differentiation and avoidance of confusion
(2) A local variation, used in the flax-processing industry, of nep
(3) In raw cotton, matted clumps of fibres which are entangled more loosely than those in neps
Textile Resource (http://www.textile.org.uk)
Soft, fuzzy surface produced on a fabric by brushing it to raise the fiber
Textile Links (http://www.textilelinks.com)