The roof of a horizontal underground passage.
Effort, usually physical.
The reverse side; the side that is not normally seen.
The keel and keelson of a ship.
A large shallow vat; a cistern, tub, or trough, used by brewers, distillers, dyers, picklers, gluemakers, and others, for mixing or cooling wort, holding water, hot glue, etc.
The part of something that goes last.
The spine and associated tissues.
The backrest, the part of a piece of furniture which receives the human back.
A ferryboat.
Large and attractive buttocks.
The inside margin of a page.
The edge of a book which is bound.
In some team sports, a position behind most players on the team.
A support or resource in reserve.
The rear of the body, especially the part between the neck and the end of the spine and opposite the chest and belly.
A non-alcoholic drink (often water or a soft drink), to go with hard liquor or a cocktail.
Among leather dealers, one of the thickest and stoutest tanned hides.
Area behind, such as the backyard of a house.
The side of a blade opposite the side used for cutting.
The side of any object which is opposite the front or useful side.
That which is farthest away from the front.
The part of a piece of clothing which covers the back.
Upper part of a natural object which is considered to resemble an animal's back.
Pronounced with the highest part of the body of the tongue toward the back of the mouth, near the soft palate (most often describing a vowel).
Not current.
Situated away from the main or most frequented areas.
At or near the rear.
Returned or restored to a previous place or condition.
Moving or operating backward.
In arrears; overdue.
Before now; ago.
In a direction opposite to the usual or desired direction of movement or progress, physically or figuratively.
So as to reverse direction and return.
Away from someone or something; at a distance.
Away from the front or from an edge.
In a manner that impedes.
In a reciprocal manner; in return.
So as shrink, recede or move aside, or cause to do so.
To a later point in time. See also put back.
Towards, into or in the past.
To or in a previous condition or place.
Earlier, ago.
In a direction opposite to that in which someone or something is facing or normally pointing.
To go in the reverse direction.
To lay out a second, smaller anchor to provide additional holding power.
To push or force backwards.
To adjoin behind; to be at the back of.
To support.
To stand still behind another dog which has pointed.
To brace the yards so that the wind presses on the front of the sail, to slow the ship.
To change direction contrary to the normal pattern; that is, to shift anticlockwise in the northern hemisphere, or clockwise in the southern hemisphere.
To make a back for; to furnish with a back.
To write upon the back of, possibly as an endorsement.
To sign or endorse (a warrant, issued in another county, to apprehend an offender).
To draw from behind the back [+accusative = a knife etc.] (as also back out).
To row backward with (oars).
To carry an infant on one's back.
A roughly cuboid building.
A temporary or permanent ban that prevents access to an online account or service, or connection to or from a designated telephone number, IP address, or similar.
A wig block: a simplified head model upon which wigs are worn.
A case or frame housing one or more sheaves (pulleys), used with ropes to increase or redirect force, for example as part of lifting gear or a sailing ship's rigging. See also block and tackle.
A cellblock.
The popping crease.
A logical extent or region; a grouping or apportionment of like things treated together as a unit.
A fixed-length group of bits making up part of a message.
A logical data storage unit containing one or more physical sectors (see cluster).
Solitary confinement.
A section of split logs used as fuel.
A blockhole.
A portion of a macromolecule, comprising many units, that has at least one feature not present in adjacent portions.
Something that prevents something from passing.
A physical area or extent of something, often rectangular or approximately rectangular.
A joined group of four (or in some cases nine) postage stamps, forming a roughly square shape.
An action to interfere with the movement of an opposing player or of the object of play (ball, puck).
A contiguous range of Unicode code points used to encode characters of a specific type; can be of any size evenly divisible by 16, up to 65,536 (a full plane).
The perch on which a bird of prey is kept.
A defensive play by one or more players meant to deflect a spiked ball back to the hitter’s court.
A substantial, often approximately cuboid, piece of any substance.
A mould on which hats, bonnets, etc., are shaped.
A region of code in a program that acts as a single unit, such as a function or loop.
A contiguous group of urban lots of property, typically several acres in extent, not crossed by public streets.
The position of a player or bat when guarding the wicket.
A chopping block: a cuboid base for cutting or beheading.
The distance from one street to another in a city or suburb that is built (approximately) to a grid pattern.
The human head.
A shot played by holding the bat vertically in the path of the ball, so that it loses momentum and drops to the ground.
A discrete group of vines in a vineyard, often distinguished from others by variety, clone, canopy training method, irrigation infrastructure, or some combination thereof.
Interference or obstruction of cognitive processes.
A set of sheets (of paper) joined together at one end, forming a cuboid shape.
A section of a railroad where the block system is used.
To hit with a block.
To wait for some condition to become true.
To specify the positions and movements of the actors for (a section of a play or film).
To prevent (something or someone) from passing.
To bar (someone undesirable) from connecting via telephone, instant messaging, etc., or from accessing an online account or service, or similar.
To play a block shot.
To stretch or mould (a knitted item, a hat, etc.) into the desired shape.
To shape or sketch out roughly.
To fill or obstruct (something) so that it is not possible to pass.
To impede (an opponent or opponent's play).
To prevent (something from happening or someone from doing something).
To bar (a message or communication), or bar connection with (an online account or service, a designated telephone number, IP address, etc.).