Definition of that pronoun from the Oxford Advanced American Dictionary

     

    that

     pronoun
    pronoun
    NAmE//ðæt//
     
    (pl. those
    NAmE//ðoʊz//
     
    )
     
    jump to other results
  1. 1used for referring to a person or thing that is not near the speaker, or not as near to the speaker as another Who's that? That's Peter over there. Hello. Is that Jo? That's a nice dress. Those look riper than these.
  2. 2used for referring to someone or something that has already been mentioned, or is already known about What can I do about that? Do you remember when we went to Norway? That was a good trip. That's exactly what I think.
  3. 3 (formal) used for referring to people or things of a particular type Those present were in favor of change. There are those who say (= some people say) she should not have gotten the job. Salaries are higher here than those in my country.
  4. 4
    NAmE//ðət//
     
    , NAmE//ðæt//
     
    (that) used as a relative pronoun to introduce a part of a sentence which refers to the person, thing, or time you have been talking about Where's the letter that came yesterday? Who was it that won the U.S. Open? The watch (that) you gave me keeps perfect time. The people (that) I spoke to were very helpful. It's the best novel (that) I've ever read. We moved here the year (that) my mother died. In spoken and informal written English that is nearly always left out when it is the object of the verb or is used with a preposition.
  5. Idioms
    that is (to say)
     
    jump to other results
    used to say what something means or to give more information He's a local government administrator, that is to say a civil servant. You'll find her very helpful—if she's not too busy, that is. Language Banki.e.explaining what you mean Some poems are mnemonics (i.e., they are designed to help you remember something). Some poems are mnemonics;that is to say, they are designed to help you remember something. Mnemonic poems –that is, poems designed to help you remember something – are an excellent way to learn lists. A limerick's rhyme scheme is A–A–B–B–A. In other words, the first, second, and fifth lines all rhyme with one another, while the third and fourth lines have their own rhyme. In this exercise, the reader is encouraged to work out the meaning, or rather the range of meanings, of the poem. This is a poem about death, or, more precisely, dying. He says his poems deal with “the big issues,”by which he means love, loss, grief, and death.
      that's it(informal)
       
      jump to other results
    1. 1used to say that someone is right, or is doing something right No, the other one… that's it. That's it, carry on!
    2. 2used to say that something is finished, or that no more can be done That's it, the fire's out now. That's it for now, but if I get any news I'll let you know. A week to go, and that's it!
    3. 3 used to say that you will not accept something any longer That's it, I've had enough!
    4. 4used to talk about the reason for something So that's it—the fuse had gone. You don't love me any more, is that it?
    that's that(informal)
     
    jump to other results
    used to say that your decision cannot be changed Well I'm not going, and that's that.
See the Oxford Advanced Learner's Dictionary entry: that