a crime, esp. high treason, committed against the sovereign power.
b.
an offense that violates the dignity of a ruler.
2.
an attack on any custom, institution, belief, etc., held sacred or revered by numbers of people: Her speech against Mother's Day was criticized as lese majesty.
Also, lèse majesty.
Origin: 1530–40; < F lèse-majesté, after L (crīmen) laesae mājestātis (the crime) of injured majesty
lese maj·es·ty also lèse ma·jes·té (lēz' māj'ĭ-stē) n.
pl.lese maj·es·ties or lèse ma·jes·tés
An offense or crime committed against the ruler or supreme power of a state.
An affront to another's dignity.
[Partial translation of French lèse-majesté, from Latin (crīmen) laesae māiestātis, (the crime) of injured majesty : laesae, feminine genitive of laesus, past participle of laedere, to injure + māiestātis, genitive of māiestās, majesty.]