Webster's Revised Unabridged Dictionary · 1913

fealty

fealty (fē"al*ty) , noun

[Old English feaute, Old French feauté, fealté, feelté, feelteit, from Latin fidelitas, from fidelis faithful. See Feal, and compare Fidelity.]

1.
Fidelity to one's lord; the feudal obligation by which the tenant or vassal was bound to be faithful to his lord; the special oath by which this obligation was assumed; fidelity to a superior power, or to a government; loyalty. It is no longer the practice to exact the performance of fealty, as a feudal obligation. — Wharton (Law Dict.)
2.
Fidelity; constancy; faithfulness, as of a friend to a friend, or of a wife to her husband.
He should maintain fealty to God. — I. Taylor
Makes wicked lightnings of her eyes, and saps The fealty of our friends. — tennyson
Swore fealty to the new government. — Macaulay

Fealty is distinguished from homage, which is an acknowledgment of tenure, while fealty implies an oath. See Homage.