[sand-kas-uh l, -kah-suh l]
- a small castlelike structure made of wet sand, as by children at a beach.
- a plan or idea with little substance.
Origin of sandcastle
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a mass of sand moulded into a castle-like shape, esp as made by a child on the seashore