first cause (uncountable)
- (theology, philosophy, sometimes capitalized) An initial cause from which all other causes and effects follow.
- "first cause" in the Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.
- "first cause" in the Wordsmyth Dictionary-Thesaurus (Wordsmyth, 2002)
- “first+cause” in Microsoft's Encarta World English Dictionary, North American Edition (2007)