[ sand-kas-uhl, -kah-suhl ]

  1. a small castlelike structure made of wet sand, as by children at a beach.

  2. a plan or idea with little substance.

Origin of sandcastle

First recorded in 1850–55; sand + castle Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use sandcastle in a sentence

  • Having found these things, they entered into a contented peace, and built a sand castle.

    The Furnace | Rose Macaulay
  • How do you expect to get into Sand Castle the ridiculous size that you are at present?

    The Missing Prince | G. E. Farrow
  • I wonder which of them is to show me the way to Sand Castle.

    The Missing Prince | G. E. Farrow
  • It dissolved before his eyes as a sand castle on the shore dissolves at the touch of an incoming tide.

    A Rock in the Baltic | Robert Barr

British Dictionary definitions for sand castle

sand castle

  1. 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