Correct spelling for the English word "SIRVSA" is [sˈɜːvsə], [sˈɜːvsə], [s_ˈɜː_v_s_ə] (IPA phonetic alphabet).
"SIRVSA" is not a recognized or commonly used term in the English language. As a result, it does not have an official dictionary definition. It is possible that "SIRVSA" is an acronym or a specific term in a specialized field or domain that is not widely known or documented. Without further context or information, it is difficult to provide an accurate definition.