1) Imaginary place 2) Mythical place 1) Visionary 
• (a.) Of or pertaining to Laputa, an imaginary flying island described in Gulliver`s Travels as the home of chimerical philosophers. Hence, fanciful; preposterous; absurd in science or philosophy.
La·pu'tan adjective Of or pertaining to Laputa, an imaginary flying island described in Gulliver's Travels as the home of chimerical philosophers. Hence, fanciful; preposterous; absurd in science or philosophy. ' Laputan ideas.' G. Eliot. 
adjective relating to or characteristic of the imaginary country of Laputa or its people