Correct spelling for the English word "THMN" is [tˌiːˌe͡ɪt͡ʃˌɛmˈɛn], [tˌiːˌeɪtʃˌɛmˈɛn], [t_ˌiː__ˌeɪ_tʃ_ˌɛ_m_ˈɛ_n] (IPA phonetic alphabet).
Unfortunately there is no widely recognized or published definition for the term "THMN." It appears to be an acronym or abbreviation that is specific to a particular context or organization. Acronyms and abbreviations can be unique to a particular industry, company, or group, making it difficult to provide a dictionary definition without more information.
To better understand the meaning of "THMN," it would be helpful to provide additional context or details about the term. This could include the field or industry where it is commonly used, any related terms or concepts, or the specific organization or group associated with it.
With more information, it would be possible to provide a more accurate and tailored definition of "THMN."