From Longman Dictionary of Contemporary EnglishOSHAOSHA /ˈəʊʃə/ (the Occupational Safety and Health Administration) a US government organization that looks after the safety and health of people at work → compare Health and Safety Executive, theFrom Longman Business DictionaryOSHAOSHA /ˈəʊʃəˈoʊ-/ nounORGANIZATIONSLAW Occupational Safety and Health Administration; an organization in the US that is responsible for making sure companies and other employers obey the rules about health and safety for the people who work in their factories, offices etc