subdivision

UK: /ˌsʌbdɪˈvɪʒ^ən/ US: /ˈsʌbdɪˌvɪʒən/ ,(sub′di vizh′ən)

WordReference Random House Unabridged Dictionary of American English © 2025

sub•di•vi•sion  (sub′di vizh′ən), 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. Biology [Bot., Mycol.] a category of related classes within a division or phylum.

• Late Latin subdīvīsiōn- (stem of subdīvīsiō), equivalent. to subdīvīs(us) (past participle of subdīvīdere to subdivide) + -iōn- -ion
• 1545–55

Collins Concise English Dictionary © HarperCollins Publishers::

subdivision / ˈsʌbdɪˌvɪʒən/ noun

1. the process, instance, or state of being divided again following upon an earlier division
2. a portion that is the result of subdividing
3. a tract of land for building resulting from subdividing land
4. a housing development built on such a tract

WordReference Random House Learner's Dictionary of American English © 2025

sub•di•vide /ˈsʌbdɪˌvaɪd/   v., -vid•ed, -vid•ing. 

1. (of something already divided) to (cause to) become divided into smaller parts: [no object]
   The recently formed egg cells subdivided.
   [~ + object]
   to subdivide the cells.
2. to divide (a piece of land) into building lots:
   [~ + object] to subdivide the three-square-block area into smaller units for development.

sub•di•vi•sion /ˈsʌbdɪˌvɪʒən/  n. 

[countable] a housing subdivision; a political subdivision.

WordReference Random House Unabridged Dictionary of American English © 2025

sub•di•vide  (sub′di vīd′, sub′di vīd′), v., -vid•ed, -vid•ing. 
v.t. 

1. to divide (that which has already been divided) into smaller parts;
   divide again after a first division.
2. to divide into parts.
3. to divide (a plot, tract of land, etc.) into building lots.

v.i. 

4. to become separated into divisions.

• Late Latin subdīvīdere. See sub-, divide
• late Middle English 1400–50

sub′di•vid′a•ble, adj. 
sub′di•vid′er, n.