1. a person who supports or advocates secession from a political union

1. relating to or supporting secession from a political union

Examples

• The secessionist movement gained momentum in the southern states.
• He was known as a prominent secessionist leader during the Civil War era.
• The secessionist party called for independence from the federal government.
• Many secessionists believed their state had the right to leave the union.
• The newspaper published secessionist editorials throughout 1860.
• Secessionist sentiment was strongest in the rural counties.