Definition of "warren"
warren
noun
plural warrens
(figuratively) A mazelike place of passages and/or rooms in which it's easy to lose oneself; especially one that may be overcrowded.
Quotations
Andrew had allowed her practically a free hand, and her interference had resulted in making the house a warren of rooms, connected by narrow corridors that meant much more work and worry for the housekeeper than the conventional model would have given.
2000, Christiaan Louis Leipoldt, Stephen Gray, Stormwrack, page 26
With demand having increased by almost 40% in the past ten years, overcrowding now threatens to reach occasionally dangerous levels on platforms and in the warren of narrow subterranean passageways between them and the surface.
2019 October 23, Paul Stephen delivers a progress report on London Underground's transformative Bank Station capacity upgrade, Rail, page 68
(archaic) The class of small game such as hare, pheasants, stoats, etc., as opposed to beasts of chase such as deer, bear, and foxes.
Quotations
A forest is a certen territorie of wooddy grounds and fruitfull pasrues, priviledged for wild beast and foules of forest, chase, and warren to rest and abide in, in the safe protection of the king for his princely delight and pleasure, which territorie of ground, so priviledged, is meered and bounded with unremoveable marks, meeres, and boundaries, either known by matter of record or els by presceription;
1598, folio 1
Free warren is a franchise , erected for the preservation or custody ( which the word signifies ) of beasts and fowls of warren; which , being feræ naturæ , every one had a natural right to kill as he could : but upon the introduction of the forest laws, at the period of the Norman conquest, these animals being looked upon as royal game and the sole property of our savage monarchs, this franchise of free-warren was invented to protect them; by giving the grantee a sole and exclusive power of killing such game so far as his warren extended, on condition of his preventing other persons. A man therefore that has the franchise of a warren, is in reality no more than a royal gamekeeper; but no man, not even a lord of a manor, could by common law justify sporting on another's soil, unless he had the liberty of free-warren.
1823, Thomas Burgeland Johnson, The Shooter's Companion, page 296
The franchise of free warren is to be claimed only by grant from the crown, or by prescription which supposes such a grant (n); and the effect of it is, to vest in the grantee a property in such wild animals or inferior specieis of game as are deemed to beasts and fowls of warren (0).
1867, John Scriven, A Treatise on Copyholds. Customary Freeholds, Ancient Demesne, and the Jurisdiction of Courts Baron and Courts Leet, page 477
A place legally authorized for the keeping, breeding and hunting of beasts of warren, especially rabbits.
Quotations
Free warren is a franchise , erected for the preservation or custody ( which the word signifies ) of beasts and fowls of warren; which , being feræ naturæ , every one had a natural right to kill as he could : but upon the introduction of the forest laws, at the period of the Norman conquest, these animals being looked upon as royal game and the sole property of our savage monarchs, this franchise of free-warren was invented to protect them; by giving the grantee a sole and exclusive power of killing such game so far as his warren extended, on condition of his preventing other persons. A man therefore that has the franchise of a warren, is in reality no more than a royal gamekeeper; but no man, not even a lord of a manor, could by common law justify sporting on another's soil, unless he had the liberty of free-warren.
1823, Thomas Burgeland Johnson, The Shooter's Companion, page 296
And when the play was over, this John Adroyns in the evening departed from the market town to go home; and because he had there no change of clothing, he went forth in his devil's apparel; and his way lay through a warren of rabbits, belonging to a gentleman of the village, where he himself dwelt; at which time it happened that a priest, a vicar of the church, with two or three other idle fellows, brought with them a horse, a snare, and a ferret, to take the rabbits; and when the ferret was in the earth, and the snare set over the path where this John Adroyns should come, the priest and his fellows, seeing him coming, and considering they were in the devil's service, by stealing the rabbits though it was the devil indeed, ran away for fear.
1845, Shakspeare's merry tales, page 5
Now warrenders tell us, and we are convinced of the fact from repeated experience, that if a wounded or dying rabbit get into a burrow, none of the living ones will ever pass it: they will die in their holes first; so that a single wounded or dead animal will cause the death of perhaps a score of their own kind in the same locality. This becomes a real loss to the proprietor of a warren.
1854, Robert Blakely, Shooting, page 159
As to the privileges of an owner of a free warren, he may not only prosecute a trespasser who is in pursuit of beasts and fowls of warren, whether he be a stranger in the locality, or a tenant of lands within the limits of the free warren, but he may also kill any dogs found hunting in his warren, whether they are doing damage at the time or not.
1898, James Edmund Harting, Alexander Innes Shand, The Rabbit, page 55
Commission of oyer and terminer to Robert de Morle, John de Shardelowe, William Giffard and John de Hemenhale, on complaint by Edward de Monte Acuto that Giles de Wyngefeld, Ranulph de Wyngefeld and other broke his part at Ersham, co. Norfolk, hunted therein and in his free warren, fished in his several fishery there, carried away fish and deer with hares and rabbits from his warren, and assaulted his men and servants.
1900, Great Britain. Public Record Office, Calendar of the Patent Rolls Preserved in the Public Record, page 102
(historical) The right to maintain and hunt an area of small beasts, similar to a free warren, but with certain limitations, such as restricting the right to hunt on parts of the land held by freeholders.
Quotations
Free-warren confers the property in wild animals, and that property may be claimed (a) in the land of another, to the exclusion of the owner of the soil; for in ancient times persons summoned to parliament often obtaine from the Crown grants of warren in their demesne lands, comprising such parts of their manors or honours as then were, or might come into their actual possession; but the grant of warren(b) to a party in all his demsne lands, does not extend over the lands of freeholders of the manor, as such grants are construed strictly.
1845, John Smith Furlong, A Treatise on the Law of Landlord and Tenant, page 337
Warren grants contained prohibitions on fishing more frequently than forest grants did.
1988, David Maxwell Walker, A Legal History of Scotland: The beginnings to A.D. 1286, page 379