I was talking to a witness about witnessing and i looked in the Insight book under the word Witness it had see Legal Case. So I looked in my The Oxford Companion To The Bible.(Oxford University Press Inc.1993) On page 806 it says after quoting Isaiah 43:10 'Israel is to take God's side and bear witness to him as the lord of history, the only true God, and her redeemer and saviour.'
It starts out by stating.
'As a juridical term. a witness is one who has direct knowledge about certain facts and can declare before a court of law what he or she has seen or heard'.
This is similar to what it says in the Jehovah's Witnesses Proclaimers Of God's Kingdom (1993 Watchtower)on page 12/13
'According to the Theological Dictionary of the New Testament, "the concept of witness [is used] both in the sense of witness to ascertainable facts and also in that of witness to truths i.e., the making known and confessing of convictions." So a witness relates facts from direct personal knowledge, or he proclaims views or truths of which he is convinced.'