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We found 13 dictionaries with English definitions that include the word smithsonian:
Click on the first link on a line below to go directly to a page where "smithsonian" is defined.

General (11 matching dictionaries)

1. Smithsonian: Collins English Dictionary [home, info]
2. Smithsonian, smithsonian: Wordnik [home, info]
3. Smithsonian: Wiktionary [home, info]
4. Smithsonian: Dictionary.com [home, info]
5. Smithsonian: Online Etymology Dictionary [home, info]
6. Smithsonian (WMATA station), Smithsonian (Washington Metro), Smithsonian (disambiguation), Smithsonian (magazine), Smithsonian, The Smithsonian: Wikipedia, the Free Encyclopedia [home, info]
7. Smithsonian: Online Plain Text English Dictionary [home, info]
8. smithsonian: Webster's Revised Unabridged, 1913 Edition [home, info]
9. Smithsonian: AllWords.com Multi-Lingual Dictionary [home, info]
10. smithsonian: Free Dictionary [home, info]
11. Smithsonian: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

12. Smithsonian, The Smithsonian: Encyclopedia [home, info]

Slang (1 matching dictionary)

13. Smithsonian: Urban Dictionary [home, info]

Quick definitions from Wiktionary (Smithsonian) ▸ adjective:  Of or pertaining to James Smithson (c.1765–1829), British mineralogist and chemist whose bequest was used to set up the Smithsonian Institution in the United States. ▸ noun:  The Smithsonian Institution, a group of museums and research centers established in 1846 and administered by the United States government. ▸ Word origin ▸ Words similar to smithsonian ▸ Usage examples for smithsonian ▸ Idioms related to smithsonian (New!) ▸ Popular adjectives describing smithsonian ▸ Popular nouns described by smithsonian ▸ Words that often appear near smithsonian ▸ Rhymes of smithsonian ▸ Invented words related to smithsonian