'Plaque' definitions:

Definition of 'plaque'

From: WordNet
noun
(pathology) a small abnormal patch on or inside the body
noun
A memorial made of brass [syn: brass, memorial tablet, plaque]

Definition of 'Plaque'

From: GCIDE
  • Plaque \Plaque\, n. [F. Cf. Plack, and see Placard.] Any flat, thin piece of metal, clay, ivory, or the like, used for ornament, or for painting pictures upon, as a slab, plate, dish, or the like, hung upon a wall; also, a smaller decoration worn on the person, as a brooch. [1913 Webster]