- Ⅰ.I  (also i) ► NOUN (pl. Is or I's) 1) the ninth letter of the alphabet. 2) denoting the next after H in a set. 3) the Roman numeral for one.Ⅱ.I  ► PRONOUN (first person sing. ) ▪ used by a speaker to refer to himself or herself.ORIGIN Old English.
English terms dictionary. 2015.