It means that what you may consider "rich" I may consider "middle class" or something else. If you're homeless, anyone with a home and meals on the table may seem rich. " If you live in a nice house and take vacations every year, you may say that people to travel first class and don't have to work at all are rich.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.