divider (Noun) — A taxonomist who classifies organisms into many groups on the basis of relatively minor characteristics.
divider (Noun) — A person who separates something into parts or groups.
divider (Noun) — A vertical structure that divides or separates (as a wall divides one room from another).
divider (Noun) — A drafting instrument resembling a compass that is used for dividing lines into equal segments or for transferring measurements.