Definition of "fief"

Fief: m[asculine] A Fief. A (Knights) fee, a Mannor, or inheritance held by homage, and fealty; and given at the firſt, in truſt, and upon promiſe of aſſiſtance, or ſervice in the wars: […] Alſo, a Tenure, or Eſtate in fief, or in fee. This word was firſt heard of, after the conqueſt of Gallia by the Francs (or ancient French-men) when their Soveraign Princes, reſerving ſome land for their own Domains, diſtributed the reſt (by whole Countreys, or large territories) among their Captains, and principal followers, on condition, that they ſhould hold of them, and aid them in their wars […]

1673, Randle Cotgrave, “Fief”, in A French and English Dictionary, London: Anthony Dolle

And be it further ordained and enacted by the Authority aforesaid, That the Right and Title of the said Ecclesiastics of the Seminary of Saint Sulpice of Montreal, in and to all and singular the said Fiefs and Seigniories of the Island of Montreal, of the Lake of the Two Mountains, and of Saint Sulpice, and their several Dependencies, and in and to all Seigniorial and Feudal Rights, Privileges, Dues, and Duties arising out of and from the same, and in and to all and every the Domains, Lands, Reservations, Buildings, Messuages, Tenements, and Hereditaments within the said several Fiefs and Seigniories now held and possessed by them as Proprietors thereof, […] shall be and they are hereby confirmed and declared good, valid, and effectual in the Law; […]

1840 June 8, C[harles] Poulett Thomson, “An Ordinance to incorporate the Ecclesiastics of the Seminary of Saint Sulpice of Montreal ”, in Copy of Ordinances Passed by the Governor and Special Council of Lower Canada, in the Third and Fourth Years of the Reign of Her Majesty Queen Victoria (Accounts and Papers. United Kingdom. Parliament. House of Commons; 1841, session 1), volume XV, published 3 February 1841, pages 151–152

The chief obligation of a sipahi was to take up residence on his fief and to be prepared at all times to rally, armed for battle, to his banner-holder's flag on the sultan's order. According to the income of his fief, every sipahi had to raise a fixed number of armed horsemen (cebeli), who followed him on campaigns.

1992, Franz [Carl Heinrich] Babinger, translated by Ralph Manheim, edited by William C. Hickman, Mehmed the Conqueror and His Time (Bollingen Series; XCVI), Princeton, N.J.: Princeton University Press, page 446

By the 14th century, however, fief holding was in decline, as salaries and retainer fees, rather than fiefs, became standard for aristocrats in binding their knights to them, and as kings increasingly exercised royal power directly or through judges and bureaucrats, not through dukes and counts. Fief holding, which is what "feudalism" must be considered to mean if the term has any precise meaning at all—and what the term meant when it was coined in the 17th century—had become an insignificant part of social and governmental relations by the end of the Middle Ages.

1995, Constance B. Bouchard, edited by William W. Kibler et al., Medieval France: An Encyclopedia (Garland Reference Library of the Humanities; 932), New York, N.Y., London: Garland Publishing, page 660

Where a vassal kills the brother, son, or grandson of his lord, he should lose his fief on account of it.

2001, “Law IX. For What Offenses Committed Against His Lord a Vassal Loses His Fief, and Also How the Lord Loses the Ownership of It if He Commits an Offense Against His Vassal.”, in Samuel Parsons Scott, transl., edited by Robert I[gnatius] Burns, Las Siete Partidas: Volume 4: Family, Commerce, and the Sea: The Worlds of Women and Merchants (The Middle Ages Series), volumes IV (Partidas IV and V), Philadelphia, Pa.: University of Pennsylvania Press, page 1001

Investiture was the conferring of a fief by the lord to the vassal, and the rite consisted in the handing over by the lord of some symbolic object intended to represent the act of concession.

2010, Gerard J. Brault, “The Death of Roland—Laisses 174–176 (verses 2355–2396)”, in The Song of Roland: An Analytical Edition. Volume I. Introduction and Commentary, University Park, Pa., London: The Pennsylvania State University Press, page 256

Through the years of my childhood my maternal grandmother remained the one unforgettable presence, the strong country woman ruling over her farm like a medieval lord. On her fief I first opened my eyes to poetry and to the land. […] There was something of the ancient matriarch in her, who had given her life to the ground, who felt that on her fief in southern Luxembourg she stood in the right place.

1989, Liliane Welch, “Grandparents: A Fragment”, in C. Dino Minni, editor, Ricordi, Things Remembered: An Anthology of Short Stories, Montreal: Guernica Editions, page 59