Witness or evidence (2 Thessalonians 1:10).
The Scriptures, as the revelation of God's will (2 Kings 11:12; Psalms 19:7; 119:88; Isaiah 8:16,20).
The altar raised by the Gadites and Reubenites (Joshua 22:10).
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Testimony'". "Easton's Bible Dictionary".