n. 1 a rhombus or diamond figure. 2 a small sweet or medicinal tablet, orig. lozenge-shaped, for dissolving in the mouth. 3 a lozenge-shaped pane in a window. 4 Heraldry a lozenge-shaped device. 5 the lozenge-shaped facet of a cut gem. lozenged adj. (in sense 4). lozengy adj.
[ ME f. OF losenge, ult. of Gaulish or Iberian orig. ]