oceanside adjective 1adverb 1noun 1forms 1 adjective1 •Located on the coast of an ocean.We stayed in an oceanside hotel and ate fresh seafood every night, all week long. adverb1 •At the oceanside.We dined oceanside and watched the gulls' antics. noun1 •The area by and around the ocean.Oh for a hotel on the oceanside and lobster or crab at every dinner! formsoceansides