that

adverb

1. (degree) To a given extent or degree.

- "The ribbon was that thin." "I disagree, I say it was not that thin, it was thicker... or maybe thinner..."

2. (degree) To a great extent or degree; very, particularly (in negative constructions).

- I'm just not that sick.

- I did the run last year, and it wasn't that difficult.

3. (obsolete outside dialects) To such an extent; so, such. (in positive constructions).

- Ooh, I was that happy I nearly kissed her.

conjunction

1. Introducing a clause that is the subject or object of a verb (such as one involving reported speech), or that is a complement to a previous statement.

- He told me that the book is a good read.

- I believe that it is true. — She is convinced that he is British.

2. Introducing a subordinate clause expressing a reason or cause: because, in that.

- Be glad that you have enough to eat.

3. (now uncommon) Introducing a subordinate clause expressing an aim, purpose, or goal: so, so that.

4. Introducing — especially, but not exclusively, with an antecedent like so or such — a subordinate clause expressing a result, consequence, or effect.

- The noise was so loud that she woke up.

- The problem was sufficiently important that it had to be addressed.

5. (archaic or poetic) Introducing a premise or supposition for consideration: seeing as; inasmuch as; given that; as would appear from the fact that.

6. Introducing a subordinate clause modifying an adverb.

- Was John there? — Not that I saw.

- How often did she visit him? — Twice that I saw.

7. Introducing an exclamation expressing a desire or wish.

8. Introducing an exclamation expressing a strong emotion such as sadness or surprise.

determiner

1. The (thing, person, idea, etc) indicated or understood from context, especially if more remote physically, temporally or mentally than one designated as "this", or if expressing distinction.

- That book is a good read. This one isn't.

- That battle was in 1450.

- That cat of yours is evil.

noun

1. (philosophy) Something being indicated that is there; one of those.

pronoun

1. (demonstrative) The thing, person, idea, quality, event, action, or time indicated or understood from context, especially if more remote geographically, temporally or mentally than one designated as "this", or if expressing distinction. [from 9thc.]

- He went home, and after that I never saw him again.

2. (demonstrative) The aforementioned quality; used together with a verb and pronoun to emphatically repeat a previous statement.

- The water is so cold! — That it is.

3. (relative) Which, who. [from 9thc.]

- the CPR course that she took really came in handy