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.