Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
straight-arm is a noun meaning "(American football) the act of warding off a tackler by holding the arm fully extended with the hand against the opponent". It carries one recorded sense.
(American football) the act of warding off a tackler by holding the arm fully extended with the hand against the opponent
American football
Definitions, synonyms and semantic relations for straight-arm come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.