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Definition of sinclair
sinclair
/sɪnˈklɛər/
sin · clair
Plural:Sinclairs
sinclair Lexical Profile
CEFR
B2
Grade
8
Tier
2
Usage
Rare
Syllables
2
• noun
1
A surname of Scottish and Norman origin, or a member of the historical Highland and Lowland Scottish Clan Sinclair.
Example
"The historian traced the lineage of the Sinclair family back to medieval Caithness."
2
A masculine or feminine given name transferred from the Scottish surname.
Example
"Sinclair Lewis became the first writer from the United States to receive the Nobel Prize in Literature."
• Rhymes for sinclair
Word Origin & Etymology
Derived from the Anglo-Norman habitational name Saint-Clair, brought to Scotland in the 11th century and ultimately from the Latin Sanctus Clarus.
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Sinclair. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/sinclair