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a. Being or containing water that is somewhat salty but less salty than sea water.
b. Having a somewhat salty taste or smell: "You could cut the brackish winds with a knife / Here in Nantucket" (Robert Lowell).
2. Distasteful; unpalatable: a thin, brackish gruel.
[From Dutch brak.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.