barn Meaning, Definition & Usage

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

WordNet

Barn noun
Etymology
OE. bern, AS. berern, bern; bere barley + ern, ærn, a close place. 92. See Barley.
Definitions
  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.
Barn transitive verb
Definitions
  1. To lay up in a barn. Obs. Shak.
    Men . . . often barn up the chaff, and burn up the grain. Fuller.
Barn noun
Definitions
  1. A child. Obs. See Bairn.

Webster 1913