Source : Webster's Revised Unabridged Dictionary (1913)

Subminister \Sub*min"is*ter\, v. t. [L. subministrare,
   subministratum. See {Sub-}, and {Ministre}, v. t.]
   To supply; to afford. [Obs.] --Sir M. Hale.

Subminister \Sub*min"is*ter\, v. i.
   To be subservient; to be useful. [Obs.] ``Our passions . . .
   subminister to the best and worst purposes.'' --L'EStrange.