- 1[singular] (usually used in negative sentences) an extremely small amount There is not one iota of truth (= no truth at all) in the story. I don't think that would help one iota.
- 2 the 9th letter of the Greek alphabet (I, ι) Word Originfrom Greek iōta. This arose because iota is the smallest letter of the Greek alphabet: compare with jot.
Check pronunciation: iota
