[ sand-kas-uh l, -kah-suh l ]
/ ˈsændˌkæs əl, -ˌkɑ səl /
a small castlelike structure made of wet sand, as by children at a beach.
a plan or idea with little substance.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for sand castle
a mass of sand moulded into a castle-like shape, esp as made by a child on the seashore
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012