Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
overarm is an adjective meaning "with hand brought forward and down from above shoulder level". It carries one recorded sense.
with hand brought forward and down from above shoulder level
“an overhand pitch”
“an overhand stroke”
sport
Definitions, synonyms and semantic relations for overarm come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.