that

Length / number of characters: 4
Number of words: 1

As a demonstrative pronoun (pl. Those), that usually points out, or refers to, a person or thing previously mentioned, or supposed to be understood. That, as a demonstrative, may precede the noun to which it refers
As an adjective, that has the same demonstrative force as the pronoun, but is followed by a noun
As a relative pronoun, that is equivalent to who or which, serving to point out, and make definite, a person or thing spoken of, or alluded to, before, and may be either singular or plural
As a conjunction, that retains much of its force as a demonstrative pronoun
To introduce a clause employed as the object of the preceding verb, or as the subject or predicate nominative of a verb
To introduce, a reason or cause
To introduce a purpose
To introduce a consequence, result, or effect
In an elliptical sentence to introduce a dependent sentence expressing a wish, or a cause of surprise, indignation, or the like
As adverb: To such a degree
Residential area (city, town, village) in India in Rajasthan
Residential area (city, town, village) in Pakistan in North-West Frontier
Residential area (city, town, village) in Pakistan in Sindh

You can also check definition for that on wikipedia or google (link opens in new window)