/ dʒɒt; NAmE dʒɑːt/ verb , noun
■ verb
( -tt- )
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PHRASAL VERBS
- jot sth down
■ noun
[ sing. ] not a / one jot used to mean 'not even a small amount' when you are emphasizing a negative statement :
There's not a jot of truth in what he says (= none at all) .
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WORD ORIGIN
late 15th cent. (as a noun): via Latin from Greek iōta , the smallest letter of the Greek alphabet (see iota ).