That

pronoun, plural those.
1.
(used to indicate a person, thing, idea, state, event, time, remark, etc., as pointed out or present, mentioned before, supposed to be understood, or by way of emphasis):
That is her mother. After that we saw each other.
2.
(used to indicate one of two or more persons, things, etc., already mentioned, referring to the one more remote in place, time, or thought; opposed to this):
This is my sister and that’s my cousin.
3.
(used to indicate one of two or more persons, things, etc., already mentioned, implying a contrast or contradistinction; opposed to this):
This suit fits better than that.
4.
(used as the subject or object of a relative clause, especially one defining or restricting the antecedent, sometimes replaceable by who, whom, or which):
the horse that he bought.
5.
(used as the object of a preposition, with the preposition standing at the end of a relative clause):
the farm that I spoke of.
6.
(used in various special or elliptical constructions):
fool that he is.
adjective, plural those.
7.
(used to indicate a person, place, thing, or degree as indicated, mentioned before, present, or as well-known or characteristic):
That woman is her mother. Those little mannerisms of hers make me sick.
8.
(used to indicate the more remote in time, place, or thought of two persons, things, etc., already mentioned; opposed to this):
This room is his and that one is mine.
9.
(used to imply mere contradistinction; opposed to this):
not this house, but that one.
adverb
10.
(used with adjectives and adverbs of quantity or extent) to the extent or degree indicated:
that much; The fish was that big.
11.
to a great extent or degree; very:
It’s not that important.
12.
Dialect. (used to modify an adjective or another adverb) to such an extent:
He was that weak he could hardly stand.
conjunction
13.
(used to introduce a subordinate clause as the subject or object of the principal verb or as the necessary complement to a statement made, or a clause expressing cause or reason, purpose or aim, result or consequence, etc.):
I’m sure that you’ll like it. That he will come is certain. Hold it up so that everyone can see it.
14.
(used elliptically to introduce an exclamation expressing desire, a wish, surprise, indignation, or other strong feeling):
Oh, that I had never been born!
Idioms
15.
at that,

in spite of something; nevertheless:
Although perhaps too elaborate, it seemed like a good plan at that.
in addition; besides:
It was a long wait, and an exasperating one at that.

16.
that is, (by way of explanation, clarification, or an example); more accurately: I read the book, that is, I read most of it.
I believe his account of the story, that is to say, I have no reason to doubt it.
Also, that is to say.
17.
that’s that, Informal. there is no more to be said or done; that is finished:
I’m not going, and that’s that!
18.
that way, Informal. in love or very fond of (usually followed by about or for):
The star and the director are that way. I’m that way about coffee.
19.
with that, following that; thereupon:
With that, he turned on his heel and fled.
1.
contraction of that is:
That’s mine.
2.
contraction of that has:
That’s got more leaves.
determiner (used before a sing noun)
1.

used preceding a noun that has been mentioned at some time or is understood: that idea of yours
(as pronoun): don’t eat that, that’s what I mean

2.

used preceding a noun that denotes something more remote or removed: that dress is cheaper than this one, that building over there is for sale
(as pronoun): that is John and this is his wife, give me that Compare this

3.
used to refer to something that is familiar: that old chap from across the street
4.
(informal) and that, and all that, everything connected with the subject mentioned: he knows a lot about building and that
5.
(completive-intensive) at that, additionally, all things considered, or nevertheless: he’s a pleasant fellow at that, I might decide to go at that
6.
like that

with ease; effortlessly: he gave me the answer just like that
of such a nature, character, etc: he paid for all our tickets — he’s like that

7.
that is

to be precise
in other words
for example

8.
that’s more like it, that is better, an improvement, etc
9.
that’s that, there is no more to be done, discussed, etc
10.
with that, at that, thereupon; having said or done that
conjunction (subordinating)
11.
used to introduce a noun clause: I believe that you’ll come
12.
Also so that, in order that. used to introduce a clause of purpose: they fought that others might have peace
13.
used to introduce a clause of result: he laughed so hard that he cried
14.
used to introduce a clause after an understood sentence expressing desire, indignation, or amazement: oh, that I had never lived!
adverb
15.
used with adjectives or adverbs to reinforce the specification of a precise degree already mentioned: go just that fast and you should be safe
16.
(usually used with a negative) (informal) Also all that. (intensifier): he wasn’t that upset at the news
17.
(dialect) (intensifier): the cat was that weak after the fight
pronoun
18.
used to introduce a restrictive relative clause: the book that we want
19.
used to introduce a clause with the verb to be to emphasize the extent to which the preceding noun is applicable: genius that she is, she outwitted the computer