Solomon's seal noun2 •Any flowering plant of the genus Polygonatum, especially Polygonatuym multiflorum.Then, when the anemones went, came a few stray periwinkles and Solomon's Seal, and all the bird-cherries blossomed in a burst. — 1898 •A mystic symbol in the form of a hexagram (or, less often, an octagram). formsSolomon's seals