OMG! Since I left, this thread has grown to 5 pages long, and half of it going over that wikipedia definition. Here, I'll save you all the trouble. BT left out the very first sentence; the key sentence that provided the actual definition.
Suburbanization is a term used by many to describe the current residential living situation in the United States.
http://en.wikipedia.org/wiki/Suburbanization
Additional definitions available support that the first sentence is the key sentence.
It is the process of lower-density residential, commercial, and industrial development beyond the central city. According to Berry and Kasarda it “is the enlargement and spread of a functionally integrated population over an increasingly wider expanse of territory” (1997,180).
http://chesapeake.towson.edu/landscape/urbansprawl/glossary.asp
refers to the movement of middle- and skilled working-class people into residential areas located some distance away from their paid employment.
http://media.pearsoncmg.com/intl/ema/uk/0131217666/student/0131217666_glo.html
The shift in population from living in higher density urban areas to lower density developments on the edge of cities.
http://www.wasd.k12.pa.us/district/curriculum/geography/geography_glossary.htm
Main Entry: sub·ur·ban·ize
Pronunciation: s&-'b&r-b&-"nIz
Function: transitive verb
Inflected Form(s): -ized; -iz·ing
: to make suburban : give a suburban character to
- sub·ur·ban·i·za·tion /-"b&r-b&-n&-'zA-sh&n/ noun
http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=suburbanization
The definition of suburbanization is as varied as the ways of measuring it. A common understanding of suburbs often refers to the white flight out of the inner cities during the 1960s and 70s. While geographers and sociologist have been interested in the variety of ways urban sprawl takes place, as a social problem, they have also been interested in the impact of urban sprawl on the environment. The effect of living in suburban areas has increased the tendency to build larger single dwelling homes as well as longer commutes to and from the central city has increased the use of raw materials, such as air quality and rural areas (Kahn 2000). Ironically, what makes suburban dwellers a concern for social scientist makes them a target for marketing and sales.
Measures of Suburban Growth
Jordon, et. al. (1998) in their paper entitled “U.S. Suburbanization in the 1980s” defined suburban or suburbanization as “the decentralization of population from the center of the urban place as measured by and exponential population density function. Suburbanization does not necessarily imply moving out of the political jurisdiction of the city; rather it is simply a movement away from the center of the city.” Viewing suburbanization as a gradient of density simplifies the measurement of suburbanization. They found that density gradients decreased as you moved away from the central city and proved to be a less cumbersome means of measurement than struggling with the location of political boundaries.
http://remotesensing.utoledo.edu/Student_website/Websites/Verls_site/A Marketing Problem 1.htm
Quite simply, suburbanization only means people are moving away from cities and into suburbs. Regardless of which interpretation one wants to use for that wikipedia article's second sentence, the first sentence is the important one. Historically, yes, suburbanization began with people moving out of cities and commuting to work in cities, and many still do. That was never a point of contention. The point of contention is that "many" is a vague term. Beyond that, even if you want to argue that "many" means "most" in that context, which it may or may not, what BT had been ignoring is that
the rest work someplace else other than in the urban areas. It also does not necessarily indicate that people are working in the city closest to their suburb. Consider the household with two working professionals who live in a suburb of NYC. One of them commutes to NYC, and the other to Philadelphia; or one to NYC, and the other to Trenton, NJ, or to Newark, NJ. There are many cities that one can commute to from a suburb.