n. [ OE. alegeaunce; pref. a- + OF. lige, liege. The meaning was influenced by L. ligare to bind, and even by lex, legis, law. See Liege, Ligeance. ] 1. The tie or obligation, implied or expressed, which a subject owes to his sovereign or government; the duty of fidelity to one's king, government, or state. [ 1913 Webster ]

2. Devotion; loyalty; as, allegiance to science. [ 1913 Webster ]

Syn. -- Loyalty; fealty. -- Allegiance, Loyalty. These words agree in expressing the general idea of fidelity and attachment to the “powers that be.” Allegiance is an obligation to a ruling power. Loyalty is a feeling or sentiment towards such power. Allegiance may exist under any form of government, and, in a republic, we generally speak of allegiance to the government, to the state, etc. In well conducted monarchies, loyalty is a warm-hearted feeling of fidelity and obedience to the sovereign. It is personal in its nature; and hence we speak of the loyalty of a wife to her husband, not of her allegiance. In cases where we personify, loyalty is more commonly the word used; as, loyalty to the constitution; loyalty to the cause of virtue; loyalty to truth and religion, etc. [ 1913 Webster ]

Hear me, recreant, on thine allegiance hear me! Shak. [ 1913 Webster ]

So spake the Seraph Abdiel, faithful found, . . .
Unshaken, unseduced, unterrified,
His loyalty he kept, his love, his zeal. Milton. [ 1913 Webster ]