The Collaborative International Dictionary of English v.0.48:
Imprest \Im*prest"\ ([i^]m*pr[e^]st"), v. t. [ imp. & p. p. Imprested; p. pr. & vb. n. Impresting.] [Pref. im- + prest: cf. It. imprestare. See Prest, n.] To advance on loan. --Burke. [1913 Webster]