The Collaborative International Dictionary of English v.0.48:

Emplaster \Em*plas"ter\, n. [OF. emplastre, F. empl[^a]tre, L.
   emplastrum a plaster or salve, fr. Gr. ?, fr. ? to plaster
   up, daub over; ? in + ? to form, mold, apply as a plaster.]
   See Plaster. [Obs.] --Wiseman.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Emplaster \Em*plas"ter\, v. t. [Cf. OF. emplastrer, F.
   empl[^a]trer. See Emplaster, n.]
   To plaster over; to cover over so as to present a good
   appearance. [Obs.] "Fair as ye his name emplaster."
   --Chaucer.
   [1913 Webster]