The spelling of the word "signation" follows the pronunciation where "si" is pronounced as /saɪ/, "gna" as /njeɪ/, and "tion" as /ʃən/. Therefore, the phonetic transcription of "signation" is /saɪnˈjeɪʃən/. This word refers to the act of signing or affixing a signature, primarily used in legal or business documents. However, it is critical to note that "signation" is not a common word and may not be accepted by dictionary authorities.