palmetto noun3 •Any of various fan palms of the family Arecaceae, especially Sabal palmetto or the saw palmetto, Serenoa repens.Broad o'er my Head the verdant Cedar wave, / And high Palmetos lift their graceful Shade. — 1749 •A native or resident of the US state of South Carolina. •A hat made of palmetto leaves. formspalmettoes · palmettos