rock salt

  1. common salt occurring in extensive, irregular beds in rocklike masses.

Origin of rock salt

First recorded in 1700–10 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use rock salt in a sentence

  • Gypsum occurs in large quantities in association with the rock-salt of the Salt Range, but the local demand is small.

  • They are both known in commerce under the name of “bay-salt,” to distinguish them from the “rock-salt” of the mines.

    The Desert Home | Mayne Reid

British Dictionary definitions for rock salt

rock salt

  1. another name for halite

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