I. pär-ˈti-shən, pər- noun
Date: 15th century
1. : the action of parting : the state of being parted : division
2. : something that divides ; especially : an interior dividing wall
3. : one of the parts or sections of a whole
II. transitive verb
Date: 1653
1.
a. : to divide into parts or shares
b. : to divide (as a country) into two or more territorial units having separate political status
2. : to separate or divide by a partition (as a wall) — often used with off
• par·ti·tion·er -ˈti-sh(ə-)nər noun