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  1. Dictionary
    I
    /ʌɪ/

    abbreviation

    • 1. Island(s) or Isle(s) (chiefly on maps).
    • 2. Italy (international vehicle registration).

    symbol

    • 1. electric current: "V = I/R"
    • 2. the chemical element iodine.

    More definitions, origin and scrabble points

  2. 1. a. : the 9th letter of the English alphabet. b. : a graphic representation of this letter. c. : a speech counterpart of orthographic i. 2. : one see Table of Numbers. 3. : a graphic device for reproducing the letter i. 4. : one designated i especially as the ninth in order or class. 5. : something shaped like the letter I. 6.

  3. noun Word forms: plural i's. 1. the ninth letter of the English alphabet: via Latin from the Greek iota, a modification of the Phoenician ( Semitic yodh, a hand ): this letter, first dotted in the 11th cent ., was not distinguished from j until the 17th cent. 2.

  4. I, i noun [C or U] (NUMBER) (also i) the sign used in the Roman system for the number 1 and as part of the numbers 2 (ii), 3 (iii), 4 (iv), 6 (vi), 7 (vii), 8 (viii), and 9 (ix) SMART Vocabulary: related words and phrases. Numbers generally. access code. binary number. C, c. cardinal.

  5. the ninth letter of the English alphabet, a vowel. any spoken sound represented by the letter I or i, as in big, nice, or ski. something having the shape of an I. a written or printed representation of the letter I or i. a device, as a printer's type, for reproducing the letter I or i. I.

  6. Define I. I synonyms, I pronunciation, I translation, English dictionary definition of I. pron. Used to refer to oneself as speaker or writer. n. pl. I's The self; the ego. Usage Note: Traditional grammar requires the nominative form of the...

  7. i is used before masculine plural words beginning with a single consonant other than x or z, or the plural noun dei; gli is used before masculine plural words beginning with a vowel, x, z, gn, or multiple consonants including pn, ps, and s +consonant, and before the plural noun dei.

  8. the numerals in the ancient Roman system of notation, still used for certain limited purposes, as in some pagination, dates on buildings, etc. The common basic symbols are I (=1), V (=5), X (=10), L (=50), C (=100), D (=500), and M (=1000). The Roman numerals for one to nine are: I, II, III, IV, V, VI, VII, VIII, IX.