Jehovah - Nissi means: The LORD Our Banner
The word used for banner can also represent a Standard, Ensign, Rod , Pole and in the case of "Jehovah - Nissi" symbolizes God's presence in victory.
Jehovah Our Banner
EX. 17: 15 - Moses built an altar and called it The LORD is my Banner.
Ps. 20:5 - We will shout for joy when you are victorious and will lift up our banners in the name of our God.
Jesus Our Banner
1 Cor. 15:57 - Thanks be to our God! He gives us the through our Lord Jesus Christ.
2 Cor. 2:14 - But thanks be to God, who always leads us in triumphal procession in Christ...