sea lavender sea·la·ven·der uncommon noun 1. any of various plants of the genus Limonium of temperate salt marshes having spikes of whit or mauve flowers Synonymssea lavendermarsh rosemarystatice Related words Word family sea-lavender family Broader terms subshrub Parts Limonium WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.