- 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
n.also sea-side, c.1200, from sea + side (n.). As an adjective from 1781. Old English had sæhealf.