An anchored floating object that serves as a navigation aid. Also used to mark a mooring spot.

late 16c., "to mark with a buoy," from buoy (n.). Meaning "rise up, lift, sustain" is from c. 1600, perhaps influenced by Spanish boyar "to float," ultimately from the sa [..]

late 13c., perhaps from either Old French buie or Middle Dutch boeye, both from West Germanic *baukna "beacon, signal" (see beacon). OED, however, supports Middle Dutch boeie, or Old French [..]

to float.

floating object anchored to the bottom of a body of water. Buoys are often equipped with signals.

(say boy) something floating on the water but anchored to sea bed. It marks the places where there is danger, or where small boats can be tied up

(n) bright-colored; a float attached by rope to the seabed to mark channels in a harbor or underwater hazards(v) float on the surface of water(v) keep afloat(v) mark with a buoy

A float; especially a floating object moored to the bottom, to mark a CHANNEL, anchor, SHOAL, ROCK, etc. Some common types include: a nun or nut buoy is conical in shape; a can buoy is squat and cylindrical above water and conical below water; a spar buoy is a vertical, slender spar anchored at one end; a bell buoy, bearing a bell, runs mechanicall [..]

A float, particularly a floating object moored to the bottom to mark a channel, anchor, shoal, rock, etc.

Report of a buoy observation (FM 18-XII BUOY)

An anchored float used for marking a position on the water or a hazard or a shoal and for mooring.

A floating, and moored, artificial navigation mark. It can be recognised by means of its shape, colour, pattern, topmark or light character, or a combination of these. It may carry various additional [..]

A float; especially a floating object moored to the bottom, to mark a channel, anchor, shoal rock, etc.

A floating conical cask, moored upon shoals, to show where the danger is; also used on anchors to show where they lie. Bunt-lines

An anchored float used for marking a position on the water or a hazard or a shoal and for mooring.

A free-floating or moored instrument platform at sea that provides measurements that may include tides, currents, wind, salinity, etc. canted

A float; especially a floating object moored to the bottom, to mark a channel, anchor, shoal rock, etc. Some common types include: a nun or nut buoy is conical in shape; a can buoy is squat and cylind [..]

Marker of rocks, obstruction, edge of safe chanel etc.

A floating object of defined shape and colour, which is anchored at a given position and serves as an aid to navigation.

A floating object marking the navigable limits of channels, sunken dangers, isolated rocks, telegraph cables etc.  |A|B|C|D|E|F|G|H|I|J|K|L|M|N|O|P|Q|R|S|T|U|V|W|X|Y|Z|  CABLE SHIP - a specially const [..]

A floating aid to navigation; as in: Leave the red buoy to starboard while returning.

A stationary floating object used as an aid for navigation.

A floating object of defined shape and color, which is anchored at a given position and serves as an aid to navigation.

  An anchored float used as an aid to navigation or to mark the location of an object.    

A float of different shape and size, attached by a cable or chain to the seabed to mark navigational channels or underwater hazards such as shallow banks, rocks or reefs. A ship's buoy could be a [..]

(1) A floating object employed as an aid to mariners to mark the navigable limits of channels, their fairways, sunken dangers, isolated rocks, etc. (2) an anchored float marking a position or for use [..]

floating marker anchored to the bottom, which by its shape and color conveys navigational information; may be lighted or unlighted, silent or with a bell or whistle.

A floating object of defined shape and color, which is anchored at a given position and serves as an aid to navigation.

A floating object employed as an aid to mariners to mark the navigable limits of channels, their fairways, sunken dangers, isolated rocks, telegraph cables, and the like; floating devices fixed in pla [..]

A floating object of defined shape and color, which is anchored at a given position and serves as an aid to navigation.

A floating object of defined shape and color, which is anchored at a given position and serves as an aid to navigation.

an anchored float marking a position or channel, or for use as a mooring or other aid to navigation. Some have a bell, light, or whistle attached to them. A buoy with a cylindrical shape and a flat to [..]

Anchored, floating device used as an aid to navigation

(1) A floating object employed as an aid to mariners to mark the navigable limits of channels, their fairways, sunken dangers, isolated rocks, etc. (2) an anchored float marking a position or for use [..]

An anchored float used for marking a position on the water or a hazard or a shoal and for mooring.

A floating mark.   Buoyancy.-- The quality of floating or being supported or borne up by a fluid. A vessel is buoyant in proportion as she is bulk for bulk lighter than the fluid she is supported in

A floating object of defined shape and color, which is anchored at a given position and serves as an aid to navigation.

A floating object employed as an aid to mariners to mark the navigable limits of channels, their fairways, sunken dangers, isolated rocks, telegraph cables, and the like; floating devices fixed in pla [..]

An unmanned floating device moored or anchored to the bottom as an aid to navigation. Buoys may be classified according to shape, as spar, cylindrical or can, conical, nun, spherical, barrel, or pilla [..]

a marker at sea that serves as a landmark, normally when entering a port

(nautical) A float moored in water to mark a location, warn of danger, or indicate a navigational channel. A life-buoy.