It means nag, enclenque, skinny beast limply. It is the name of a British musician, whose full name is Seal Henry Olusegun Olumide Adeola Samuel. It is also a singer and composer, famous for the soundtrack of the film "Batman Forever" with the song "Kiss from a Rose", with which won 3 Grammy Awards. It is the spouse of the model Heidi Klum. SEAL is also the acronym of "Sea, Air and Land" (sea, air and land), a special Corps of the armed forces of the United States. Commands of the United States Navy.
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