Meaning of “shred” - Learner’s Dictionary

shred

noun [ C ] uk us /ʃred/

a very small piece that has been torn from something:

[ usually plural ] She tore the letter to shreds.
not a shred of sth

not the smallest amount of something:

There is not a shred of evidence to support his story.

(Definition of “shred noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)