What does "sandcastle" mean?

A sculpture made of sand and resembling a miniature castle; typically, but not always, made for fun by a child on a beach.

How do you pronounce "sandcastle"?

Pronounced //ˈsæn(d)ˌkæsəl//.

Common synonyms include: beach castle, fragile plan, house of cards, sand sculpture, sandcastles, shaky proposition.

/ˈsæn(d)ˌkæsəl/ noun

noun ·Rare ·Advanced level

Noun

1
A sculpture made of sand and resembling a miniature castle; typically, but not always, made for fun by a child on a beach.
"Children learn the importance of water in soil mechanics from an early age. They learn on the beach while making sandcastles. When they use dry sand, their castle flows into a heap even as they lift the bucket. The particles of sand have no cohesion and little friction between them."

"Tom's sandcastle was destroyed by the storm."

From sand + castle.