divider

Short definition from Wiktionary

Noun

1. 1
   One who or that which divides or separates.
2. 2
   One who or that which divides or separates: A physical object for dividing up a space.
3. 3
   One who or that which divides or separates: A piece of card placed in a ring binder to separate groups of documents.
4. 4
   One who or that which divides or separates: An electronic device for separating a signal, frequency, etc., into two or more parts.
5. 5
   A device resembling a drawing compass and used to transfer measurements of length.
6. 6
   The median (US) or central reservation (UK) of a highway or other road where traffic in opposite directions are kept separated.