the land along the sea; seacoast.
situated on or pertaining to the seaside.
a city in W California, on Monterey Bay.
any area bordering on the sea, esp one regarded as a resort
(as modifier): a seaside hotel
noun 1. beach aster. noun 1. a seaside plant, Erigeron glaucus, of the temperate western coast of North America, having solitary, violet- or lilac-colored flowers.
noun 1. beach goldenrod. beach goldenrod noun 1. a composite plant, Solidago sempervirens, of eastern and southern North America, having a thick stem and large, branched, one-sided terminal clusters of yellow flowers, flourishing on sea beaches or salt marshes.
noun 1. See under knotweed.
noun 1. a species of sparrow, Ammospiza maritima, existing in two subspecies, one (Cape Sable seaside sparrow) having dark olive-drab plumage with a lighter breast and underbelly, and the other (dusky seaside sparrow) having bold black and white markings on the breast and underbelly: the dusky seaside sparrow is almost extinct.