Corner, Cornerstone - Vine's Expository Dictionary of New Testament Words
Corner, Cornerstone
[ 1,,G1137, gonia ]an angle" (Eng., "coign"), signifies
(a) "an external angle," as of the "corner" of a street, Matthew 6:5; or of a building, Matthew 21:42; Mark 12:10; Luke 20:17; Acts 4:11; 1 Peter 2:7, "the corner stone or head-stone of the corner" (See below); or the four extreme limits of the earth, Revelation 7:1; Revelation 20:8;
(b) "an internal corner," a secret place, Acts 26:26. See QUARTER.
[ 2,,G746, arche ]
"a beginning" (its usual meaning), "first in time, order, or place," is used to denote the extremities or "corners" of a sheet, Acts 10:11; Acts 11:5. See BEGINNING.
Note: For the adjective akrogoniaios (from akros, "extreme, highest," and No. 1), "a chief corner stone," See CHIEF. They were laid so as to give strength to the two walls with which they were connected. So Christ unites Jew and Gentile, Ephesians 2:20; again, as one may carelessly stumble over the "corner stone," when turning the "corner," so Christ proved a stumbling stone to Jews, 1 Peter 2:6.