In a recent story about gentrification on a local Washington, DC radio station, residents and pundits spoke to reporters and offered up the following definitions of gentrification:

the forced move of a large group of persons

when the people who are living in their own city don’t have enough to pay for housing in their own city because of new people coming in

a natural, demographic, and commercial change in a city

a market-driven change in a neighborhood where housing stock that may not be in great shape, may not be of great value, becomes a place where newcomers to the city, want to settle down.