noun

1. a parting or being parted; division into parts; separation; apportionment
2. something that separates or divides, as an interior wall dividing one room from another
3. a part or section; portion; compartment
4. Law the process of dividing property and giving separate title to those who previously had joint or common title

Etymology: ME particioune < L partitio

transitive verb

1. to divide into parts or shares; apportion
2. to set off or divide by a partition