1. A large farm building used for storing farm products and sheltering livestock.
2. A large shed for the housing of vehicles, such as railroad cars.
3. A particularly large, typically bare building: lived in a barn of a country house.
4. physics A unit of area equal to 10-24 square centimeters, used to measure cross sections in nuclear physics.

1. A building, often found on a farm, used for storage or keeping animals such as cattle.
2. A unit of surface area equal to 10-28 square metres.
3. an arena.
4. A child.

1. A covered building used chiefly for storing grain, hay, and other productions of a farm. in the united states a part of the barn is often used for stables.
2. A child. see bairn.
3. to lay up in a barn.

1. to store up in a barn.
2. A child.

1. an outlying farm building for storing grain or animal feed and housing farm animals
2. (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter