Correct spelling for the English word "LSSEHD" is [ˌɛlˈɛssˈe͡ɪd], [ˌɛlˈɛssˈeɪd], [ˌɛ_l_ˈɛ_s_s_ˈeɪ_d] (IPA phonetic alphabet).
I apologize, but "LSSEHD" does not appear to have a widely recognized or commonly used definition in any reputable dictionaries. It is possible that "LSSEHD" is an acronym or an abbreviation specific to a certain field or context. Without further information, it is difficult to provide an accurate and meaningful definition. However, it is important to note that acronyms or abbreviations can have different meanings depending on the subject matter and industry they are associated with. If you could provide more context or details regarding the usage or origin of the term "LSSEHD," I would be happy to assist you further in determining its definition.