I. jot 1 /dʒɒt $ dʒɑːt/ BrE AmE verb ( past tense and past participle jotted , present participle jotting )
jot something ↔ down phrasal verb
to write a short piece of information quickly:
Let me jot down your number and I’ll call you tomorrow.
II. jot 2 BrE AmE noun
[ Date: 1400-1500 ; Language: Latin ; Origin: iota , jota ; ⇨ ↑ iota ]
not a jot old-fashioned not at all or none at all:
There was not a jot of humour in the man.