Thummim
In Bible versions:
Thummim: NET AVS NIV NRSV NASB TEVperfection; truth
Hebrew
Strongs #08550: Mymt Tummiym
Thummim = "perfection"1) stones provided for the means of achieving a sacred lot
1a) used with the Urim, the will of God was revealed
8550 Tummiym toom-meem'
plural of 8537; perfections, i.e. (techn.) one of theepithets of the objects in the high-priest's breastplate as an
emblem of complete Truth:-Thummim.
see HEBREW for 08537
Thummim [EBD]
perfection (LXX., "truth;" Vulg., "veritas"), Ex. 28:30; Deut. 33:8; Judg. 1:1; 20:18; 1 Sam. 14:3,18; 23:9; 2 Sam. 21:1. What the "Urim and Thummim" were cannot be determined with any certainty. All we certainly know is that they were a certain divinely-given means by which God imparted, through the high priest, direction and counsel to Israel when these were needed. The method by which this was done can be only a matter of mere conjecture. They were apparently material objects, quite distinct from the breastplate, but something added to it after all the stones had been set in it, something in addition to the breastplate and its jewels. They may have been, as some suppose, two small images, like the teraphim (comp. Judg. 17:5; 18:14, 17, 20; Hos. 3:4), which were kept in the bag of the breastplate, by which, in some unknown way, the high priest could give forth his divinely imparted decision when consulted. They were probably lost at the destruction of the temple by Nebuchadnezzar. They were never seen after the return from captivity.
THUMMIM [SMITH]
[URIM AND THUMMIM AND THUMMIM]Also see definition of "Thummim" in Word Study