Allegiance, n.
Etymology: [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.
2. Devotion; loyalty; as, allegiance to science.
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. Hear me, recreant, on thine allegiance hear me! Shak. So spake the Seraph Abdiel, faithful found, . . . Unshaken, unseduced, unterrified, His loyalty he kept, his love, his zeal. Milton.
Shades of meaning
Allegiance is the obligation of fidelity and obedience that an individual owes to his government or sovereign, in return for the protection he receives. The feudal uses of these words have mostly passed away with the state of society that gave them birth; but their origin still colors their present meaning. A patriotic American feels an enthusiastic loyalty to the republic; he takes, on occasion, an oath of allegiance to the government, but his loyalty will lead him to do more than mere allegiance could demand; he pays homage to God alone, as the only king and lord, or to those principles of right that are spiritually supreme; he acknowledges the duty of obedience to all rightful authority; he resents the idea of subjection. Fealty is becoming somewhat rare, except in elevated or poetic style. We prefer to speak of the faithfulness rather than the fealty of citizen, wife, or friend.
Prepositions
We honor the allegiance of the citizen to the government; the government has a right to allegiance from the citizen.