Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
overside is an adverb meaning "over the side of a boat". It carries one recorded sense.
over the side of a boat
“Willie eased himself overside into the sea”
Definitions, synonyms and semantic relations for overside come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.