noun

• The system of burrows where rabbits live.
• (figuratively) A mazelike place of passages and/or rooms in which it's easy to lose oneself; especially one that may be overcrowded.
• (archaic) The class of small game such as hare, pheasants, stoats, etc., as opposed to beasts of chase such as deer, bear, and foxes.
• A place legally authorized for the keeping, breeding and hunting of beasts of warren, especially rabbits.
• (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.
• A surname from Old French.
• A male given name from the Germanic languages.
• A placename:
• A location in Australia
• A town in New South Wales.
• Warren Shire, a local government area in central-northern New South Wales which includes the town.
• A biogeographic region in southern Western Australia.
• A place in Canada:
• A community in Manitoba; named for railroad executive A. E. Warren.
• A community in Markstay-Warren municipality, Sudbury District, Ontario.
• A number of places in the United States:
• A city, the county seat of Bradley County, Arkansas.
• A former settlement near Fellows, Kern County, California.
• A former settlement near Mojave, Kern County, California.
• A town in Connecticut; named for Joseph Warren.
• An unincorporated community in Idaho.
• A village in Illinois; named for Warren Burnett, the first white child born in the area.
• A town in Indiana.
• An unincorporated community in Kentucky.
• A town in Maine; named for Joseph Warren.
• A town in Massachusetts; named for Joseph Warren.
• A city in Michigan; named for War of 1812 veteran Rev. Abel Warren.
• A city, the county seat of Marshall County, Minnesota; named for railroad executive Charles Howard Warren.
• A city, the county seat of Trumbull County, Ohio; named for surveyor Moses Warren.
• An unincorporated community in Missouri; named for its township, itself for Joseph Warren.
• An unincorporated community in Montana.
• A town in New Hampshire; named for Peter Warren.
• A town in Herkimer County, New York; named for Joseph Warren.
• A census-designated place in Oregon; named for the town in Massachusetts.
• A city, the county seat of Warren County, Pennsylvania; named for Revolutionary War hero Joseph Warren.
• A town in Rhode Island; named for British naval officer Peter Warren.
• A former settlement in Texas, and the former county seat of Fannin County.
• A census-designated place in Tyler County, Texas.
• An unincorporated community in Utah; named for Utah politician and Mormon leader Lewis Warren Shurtliff.
• A town in Vermont; named for Joseph Warren.
• An unincorporated community in Virginia.
• A village in Monroe County, Wisconsin.
• A town in St. Croix County, Wisconsin.
• A town in Waushara County, Wisconsin.
• A number of townships in the United States, listed under Warren Township.
• A neighbourhood of Gawsworth, Cheshire East, Cheshire, England (OS grid ref SJ8870).
• A hamlet in Stackpole and Castlemartin community, Pembrokeshire, Wales (OS grid ref SR9397).
• A village in Berkshire, England, United Kingdom.