Definitions for i, iaɪ
Random House Webster's College Dictionary
I, iaɪ(n.; i.)(pl.)I's; Is, i's; is.
the ninth letter of the English alphabet, a vowel.
any spoken sound represented by this letter.
something shaped like anI.
I*aɪ(pron.)I; my; mine; me
(pron.)the nominative singular pronoun used by a speaker or writer in referring to himself or herself.
Category: Function Word
(n.)(used to denote the narrator of a literary work written in the first person singular.)
the ego; the self.
* nom.. Usage: See me.
Origin of I:
bef. 900; ME ik, ich, i; OE ic, ih; c. OHG ih, ON ek, L ego, Gk egṓ, Skt ahám
interstate (used with a number to designate an interstate highway):
Category: Transportation, Usage Note
the ninth in order or in a series.
(sometimes l.c.) the Roman numeral for 1.
Ref: Compare Roman numerals.
Category: Electricity and Magnetism
Physics Symbol. isotopic spin.
Math Symbol. the imaginary number (-1)^(1/2).
a unit vector on the x-axis of a coordinate system.
Ref: var. of y- 6
Ref: the typical ending of the first element of compounds of Latin words, as -o- 8 is of Greek words, but often used in English with a first element of any origin, if the second element is of Latin origin:
Kernerman English Learner's Dictionary
the 9th letter of the alphabet