divider

noun6

1. •
   One who or that which divides or separates.

   • I was greatly his inferior, but love is a quick divider of shares: he that gathers much has nothing over, and he that gathers little has no lack. — 1891
2. •
   A physical object for dividing up a space.

   • It is perfectly possible to separate one area of a room from another, or even to create an entirely new room, with a lightweight room divider that assembles with a minimum of fuss. — 1980
3. •
   A piece of card placed in a ring binder to separate groups of documents.
4. •
   An electronic device for separating a signal, frequency, etc., into two or more parts.
5. •
   The median (US) or central reservation (UK) of a highway or other road where traffic in opposite directions are kept separated.
6. •
   A device resembling a drawing compass and used to transfer measurements of length.