nounNorth American informal
1.1A fanciful state or dreamworld.
- But anyone who thinks those words are evidence that he was somehow enamoured of the regime is living in la-la land.
- And anyone who thinks that research can or will be done elsewhere is living in la-la land.
- I stayed with him as they put the little cone over his nose to send him to kitty la-la land and all was well.
La-la, reduplication of LA (i.e., Los Angeles).
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