- I (i)
- 1
/aI/ plural I's, i's noun (C)
1 the ninth letter of the English alphabet2 the roman numeral representing the number one2 /aI/ pronoun used as the subject of a verb when you are the person speaking: I've just seen a strange man in your garden. | I'm not late again, am I? —see me 3 AmE the abbreviation of interstate (=an important road between states in the US): the point where I95 meets I40
Longman dictionary of contemporary English. 2004.