Definition of I in English:


(also i)


  • 1The ninth letter of the alphabet.

    • ‘The letter i is made up of a single minim, with or without a dot above it.’
    • ‘However, because of the Latin contributions to English, the letter "i" does not always comply.’
    1. 1.1 Denoting the next after H in a set of items, categories, etc.
  • 2The Roman numeral for one.

    • ‘Only assets included in Section I that are pledged should be reported here.’


  • (in metaphysics) the subject or object of self-consciousness; the ego.

    ego, oneself, persona, person, identity, character, personality, psyche, soul, spirit, mind, intellect, inner man, inner person, inner woman, inner self, one's innermost feelings, one's heart of hearts
    View synonyms


On whether it is correct to say between you and I or between you and me, see between and personal pronoun. On whether it is correct to say Rachel and I went to Paris or Rachel and me went to Paris, see personal pronoun


  • dot the i's and cross the t's

    • informal Ensure that all details are correct.

      • ‘He also told us last week that they just needed to dot the i's and cross the t's to complete their takeover but now he's saying the creditors' meeting won't take place until at least September.’
      • ‘I still think the military procurement system needs more flexibility - but it also needs to be managed by competent staffs with the capability to dot the i's and cross the t's of their contracts.’
      • ‘She finished dotting her I's and crossing her T's and handed her teacher her paper.’
      • ‘I didn't do much at work apart from filling out my appraisal as there is pressure to dot the i's and cross the t's as redundancy stalks the office for the SEVENTH time in 3 years.’
      • ‘They tended to sue him any chance they got, so it was vital to have every I dotted and every T crossed in their notes.’
      • ‘Maybe they are so dysfunctional that Parliament has to prescribe that they dot the i's and cross the t's in whatever they have to do.’
      • ‘I reckon our copies were hardly off the press before the boys in Swindon began dotting the i's and crossing the t's on their press release announcing the lowest mortgage rate in 30 years.’
      • ‘It's important to take the time to do the research - check the facts, dot the i's and cross the t's, especially when a particular piece could end up in print.’
      • ‘We are being held up, however, while we wait for the council to dot the i's and cross the t's.’
      • ‘‘All that's left to do is dot the i's and cross the t's,’ Tuttle said.’
    • informal

      see dot