Some road type classifications are influenced by city size, traffic density, and regional conventions. For example, in a very large city a primary street may have three or more lanes in each direction on a divided road. While in a town of dirt roads, the only paved single lane street could be a primary street.
subset - a set whose members are members of another set; a set contained within another set. set - (mathematics) an abstract collection of numbers or symbols; the set of prime numbers is infinite. Translations. podmnoÅ¾ina.
a subordinate group; a division of a group. 2. Chemistry. a division of a group in the periodic table. 3. Mathematics. a subset of a group that is closed under the group operation and in which every element has an inverse in the subset. Origin of subgroup.