Definition of la-la land
1
: a euphoric, dreamlike mental state detached from the harsher realities of life
When you spend time around [him] you are struck by someone who isn't living in la-la land and isn't a pushover.— Todd Balf
2
La-La Land
—used as a nickname for Los Angeles, California Like most devoted New Yorkers who find themselves in La-La Land, the author goes through at least half of the five stages of grief.— Alexandra Jacobs
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Merriam-Webster unabridged
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Time Traveler for la-la land
The first known use of la-la land was in 1979
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