A strong fenced enclosure for the protection of the sheep gathered within it (Numbers 32:24; 1 Chronicles 17:7; Psalm 50:9; 78:70). In John 10:16 the Authorized Version renders by "fold" two distinct Greek words, aule and poimne, the latter of which properly means a "flock," and is so rendered in the Revised Version. (See also Matthew 26:31; Luke 2:8; 1 Corinthians 9:7.) (see FOLD.)

Noah Webster's New International Dictionary of the English Language

(n.) A fold or pen for sheep; a place where sheep are collected or confined.