Brown-Driver-Briggs Lexicon’s first definition of “shalom” is: completeness, soundness, welfare, peace – I would add – wholeness.
Yeshua used “Shalom” in greetings to His disciples three times just in John chapter 20! He said, “Shalom l’chem”. “Peace to you” (plural m.).
The Psalm that encapsulates shalom more than any other that I can think of doesn’t even have the word “shalom” in it, but you are all familiar with it. It is the 23rd Psalm.
Psa 23:1 - A Psalm of David.
YHVH is my shepherd;
I shall not want.
2 - He makes me to lie down in green pastures;
He leads me beside the still waters.
3 - He restores my soul;
He leads me in the paths of righteousness
For His name’s sake.
4 - Yea, though I walk through the valley of the shadow of death,
I will fear no evil;
For You are with me;
Your rod and Your staff, they comfort me.
5 - You prepare a table before me in the presence of my enemies;
You anoint my head with oil;
My cup runs over.
6 - Surely goodness and mercy shall follow me
All the days of my life;
And I will dwell in the house of YHVH