partition n. (15c) 1. Something that separates one part of a space from another. 2. The act of dividing; esp., the division of real property held jointly or in common by two or more persons into individually owned interests. — Also termed partition in kind. PARTITION, Black's Law Dictionary (11th ed. 2019)
Real Proper Action and Proceedings Law (RPAPL), Art 9 Partition governs partition actions.