noun
a piece; a fragment; a bit
Refers to a single small physical piece, scrap, or fragment of something.
パンを一片ちぎって食べた。
I tore off a piece of bread and ate it.
ガラスの一片が床に落ちていた。
A fragment of glass had fallen on the floor.
noun
iota; trace; the slightest bit
Used in negative or minimal expressions to mean 'even a tiny amount', often with ～も…ない.
彼の話には一片の真実もなかった。
There wasn't a shred of truth in his story.
一片の悔いもない。
I have not the slightest regret.