1. Jewish Hist. a lamb slaughtered and eaten on the eve of the first day of Passover. Ex. 12:3-11.
2. ( caps. ) Christ.
3. ( caps. ) any of several symbolic representations of Christ, as the Agnus Dei.
4. ( caps. ) Also called Holy Lamb . Heraldry. a representation of a lamb passant having around its head a nimbus and supporting on the dexter shoulder a crosslike staff bearing a flag argent charged with a cross gules.
[ 1400-50; late ME ]