Sejm (pronounced: [sɛjm] (help·info)) is a generic Polish word meaning "a gathering or diet (assembly)". More specifically, it may refer to:

• Sejm of the Republic of Poland (Sejm Rzeczypospolitej Polskiej), the lower chamber of the parliament of Poland

Historical types of Polish sejms:

• General sejm (sejm walny), any of Polish parliamentary assemblies during the 15th–18th centuries
• Confederated sejm (sejm skonfederowany)
• Convocation sejm (sejm konwokacyjny)
• Coronation sejm (sejm koronacyjny)
• Election sejm (sejm elekcyjny)

Historic Polish sejms:

• Contract Sejm (Sejm Kontraktowy), 1989–1991
• Convocation Sejm (1764) (sejm konwokacyjny 1764 r.)
• Election Sejm of 1632 (sejm elekcyjny 1632 r.)
• Great Sejm (Sejm Wielki), 1788–1792
• Grodno Sejm (Sejm Grodzieński), 1793
• Pacification Sejm (Sejm Pacyfikacyjny), 1736
• Partition Sejm (Sejm Rozbiorowy), 1773–1776
• Repnin Sejm (Sejm Repninowski), 1767–1768
• Silent Sejm (Sejm Niemy), 1717

Legislatures of other countries and entities:

• Saeima, the parliament of Latvia
• Galician Sejm (Sejm Galicyjski), legislature of the Kingdom of Galicia and Lodomeria, 1861–1918
• Seimas, the parliament of Lithuania
  • For historic Lithuanian parliamentary assemblies, see: Template: Seimas of Lithuania
• Sejm of Four Lands or Council of Four Lands (Sejm Czterech Ziem, Va'ad Arba' Aratzot), central Jewish authority in Poland, 1580–1764
• Sejmik (diminutive of sejm), a regional or local legislature in Poland
  • Voivodeship sejmik (sejmik województwa)
• Sejm of the Republic of Central Lithuania (Sejm Litwy Środkowej), see: Republic of Central Lithuania general election, 1922
• Silesian Sejm or Silesian Parliament (Sejm Śląski), legislature of the Autonomous Silesian Voivodeship, 1920–1939

Other:

• Seym River, a river in Russia and Ukraine

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