Back Baş leytenant Azerbaijani Старшы лейтэнант Byelorussian Старэйшы лейтэнант BE-X-OLD Старши лейтенант Bulgarian Nadporučík Czech Premierløjtnant Danish Nadporutschik German Πρωθυπολοχαγός Greek Teniente primero Spanish Yliluutnantti Finnish
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Senior lieutenant is a military grade between a lieutenant and a captain, often used by countries from the former Eastern Bloc. It is comparable to first lieutenant.