Pronoun
Usually written in kana
1. that; that thing
indicating something distant from both speaker and listener (in space, time or psychologically), or something understood without naming it directly
あれはもう、分かってるの？Do you already know about that?
2. that person
used to refer to one's equals or inferiors
3. then; that time
4. that place (over there)
Noun
Colloquialism
Usually written in kana
5. down there (i.e. one's genitals)
oft. written as アレ
6. period; menses
oft. written as アレ