"a sign, token or indication," is translated "token" in 2 Thessalonians 3:17 , of writing of the closing salutations, the Apostle using the pen himself instead of his amanuensis, his autograph attesting the authenticity of his Epistles. See MIRACLE , SIGN.
"a fixed sign or signal, agreed upon with others" (sun, "with"), is used in Mark 14:44 , "a token." In the Sept., Judges 20:38,40; Isaiah 5:26; 49:22; 62:10 .
"a plain token, a proof" (akin to endeiknumi, "to point out, prove") is used in 2 Thessalonians 1:5 "a manifest token," said of the patient endurance and faith of the persecuted saints at Thessalonica, affording proof to themselves of their new life, and a guarantee of the vindication by God of both Himself and them (see No. 4, Note).
"a pointing out, showing forth," is rendered "evident token" in Philippians 1:28 . See DECLARE , B, PROOF. Cp. apodeixis, 1 Corinthians 2:4 .
Note: No. 4 refers to the act or process of proving, No. 3 to the thing proved. While the two passges, Philippians 1:28 and 2 Thessalonians 1:5 , contain similar ideas, endeigma indicates the "token" as acknowledged by those referred to; endeixis points more especially to the inherent veracity of the "token."