It's "landscaping and gardening that reduces or eliminates the need for supplemental water from irrigation," frequently with native species.
We xeriscaped much of our yard in Austin, Texas, and if it can work in Texas, then it can work anywhere. My wife took great care to make sure many of the plants were attractive to wildlife (bees, butterflies, hummingbirds) which was an added bonus. (Did you know that hummingbirds are crazy aggressive and territorial? They are!)
"Native plants" doesn't just mean ugly scrub brush either: plenty of beautiful plants grow natively where you are - but you'll probably have to look further than Home Depot to find them.