that

pl. those

Etymology: ME < OE thæt, nom. & acc. neut. of the def. article (nom. masc. se, nom. fem. seo), akin to Ger neut. nom. & acc. das < IE demonstrative base *-to-, *-tā- > there, thither, L istud, that, talis, such

adjective 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!

a subordinating conjunction used to introduce:

1. 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
2. an adverbial clause expressing purpose they died that we might live
3. an adverbial clause expressing result you ran so fast that I couldn't catch up
4. an adverbial clause expressing cause I'm sorry that I caused you such annoyance
5. an elliptical sentence expressing surprise, indignation, or desire that you should say such a thing! oh, that this day would be over!

adverb

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