I

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I1 / ī/ (also i) • n. (pl. Is or I's) 1. the ninth letter of the alphabet. ∎  denoting the next after H in a set of items, categories, etc.2. the Roman numeral for one.PHRASES: dot the i's and cross the t's see dot1 .I2 • pron. [first person sing.] used by a speaker to refer to himself or herself: accept me for what I am.• n. (the I) Philos. (in metaphysics) the subject or object of self-consciousness; the ego.I3 • abbr. ∎  Independent. ∎  (preceding a highway number) Interstate. ∎  (I.) Island(s) or Isle(s) (chiefly on maps).• symb. ∎  electric current: V = I/R. ∎  the chemical element iodine.

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