par·ti·tion 
(pär-tĭshən)
(pär-tĭshən)n.
1.
a. The act or process of dividing something into parts.
b. The state of being so divided.
2.
a. Something that divides or separates, as a lightweight wall dividing one room or cubicle from another.
b. A wall, septum, or other separating membrane in an organism.
3. A part or section into which something has been divided.
4. Division of a country into separate, autonomous nations.
5. Mathematics
a. An expression of a positive integer as a sum of positive integers.
b. The decomposition of a set into a family of disjoint sets.
6. Computers A section of storage space on a hard disk.
7. Law Division of property, especially real property, between co-owners into equivalent, separately owned portions or shares.
tr.v. par·ti·tioned, par·ti·tion·ing, par·ti·tions
1. To divide into parts, pieces, or sections.
2. To divide or separate by means of a partition: We partitioned off the alcove to make another bedroom.
3. To divide (a country) into separate, autonomous nations.
[Middle English particioun, from Old French partition, from Latin partītiō, partītiōn-, from partītus, past participle of partīre, to divide, from pars, part-, part; see PART.]
par·tition·er n.
par·tition·ment n.