THAT
pron.,
I. as a demonstrative
1 the person or thing mentioned or understood !that is John; that tastes good"
2 the thing farther away than another referred to as “this” !this is larger than that"
3 the more remote in thought of two contrasted things !of the two possibilities, this is more likely than that"
4 [pl.] certain people !those who know"
II. as a relative pronoun, now often omitted, esp. in sense 1
1 who, whom, or which "the road (that) we took"
2 where; at which; on which "the place that I saw her"
3 when; in which; on which "the year that I was born"
adj.,
pl. those
1 designating the person or thing mentioned or understood !that woman is Mary; that pie tastes good"
2 designating the thing farther away than the one referred to as “this” "this house is larger than that one"
3 designating the more remote in thought of two contrasted things "of the two, this possibility is more likely than that one"
4 designating something or someone not described but well known or easily recognizable: sometimes with implications of disparagement !that certain feeling, there comes that smile!, that George!"
conj.
1 a subordinating conjunction used to introduce: a) a noun clause expressing a supposed or actual fact !that she's gone is obvious; the truth was that we never saw her; it was true that we never saw her" b) an adverbial clause expressing purpose !they died that we might live" c) an adverbial clause expressing result "you ran so fast that I couldn't catch up" d) an adverbial clause expressing cause "I'm sorry that I caused you such annoyance" e) an elliptical sentence expressing surprise, indignation, or desire "that you should say such a thing! oh, that this day would be over!"
adv.
1 to that extent; so [I can't see that far ahead]: also used informally before an adjective modified by a clause of result [I'm that tired I could drop]
>2 [Informal] very; so very: used in negative constructions !I didn't like the book that much"
all that [Informal]
1 so very: used in negative constructions !they aren't all that rich"
2 everything of the same or related sort !sex and all that"
>at that [Informal]
1 at that point; with no further discussion, etc.: also with that
2 all things considered; even so
that is
1 to be specific
2 in other words
that's that! that is settled!
And that is what that is.
Jay