/sub"di vizh'euhn/ , n.
1. the act or fact of subdividing.
2. a product of subdividing, as a section of a department.
3. a portion of land divided into lots for real-estate development.
4. Bot. , Mycol. a category of related classes within a division or phylum.
[ 1545-55; subdivision- (s. of subdivisio ), equiv. to subdivis ( us ) (ptp. of subdividere to SUBDIVIDE) + -ion- -ION ]