the southeastern part of the U.S., including especially South Carolina, Georgia, Alabama, Mississippi, and Louisiana.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for deep south
the SE part of the US, esp South Carolina, Georgia, Alabama, Mississippi, and Louisiana
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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The southernmost tier of states in the South: South Carolina, Georgia, Florida, Alabama, Mississippi, and Louisiana. Before the Civil War, these states were centers of cotton production and slavery. All of them seceded from the United States before the firing on Fort Sumter. They are sometimes distinguished from the states of the Upper South (Virginia, North Carolina, Tennessee, and Arkansas), which contained proportionately fewer slaves prior to the Civil War and which seceded only after the firing on Fort Sumter.
The New Dictionary of Cultural Literacy, Third Edition
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