Factum \Fac"tum\ (f[a^]k"t[u^]m), n.; pl. {Facta}. [L. See
{Fact}.]
1. (Law) A man's own act and deed; particularly:
(a) (Civil Law) Anything stated and made certain.
(b) (Testamentary Law) The due execution of a will,
including everything necessary to its validity.
[1913 Webster]
2. (Mach.) The product. See {Facient}, 2.
[1913 Webster]