What is the meaning of substantiate?

verb

• Establish or strengthen as with new evidence or facts.
  • usage: "his story confirmed my doubts"; "The evidence supports the defendant"
  • synonyms: confirm, corroborate, sustain, support, affirm
• Represent in bodily form.
  • usage: "He embodies all that is evil wrong with the system"; "The painting substantiates the feelings of the artist"
  • synonyms: incarnate, body forth, embody
• Make real or concrete; give reality or substance to.
  • usage: "our ideas must be substantiated into actions"
  • synonyms: realize, realise, actualize, actualise
• Solidify, firm, or strengthen.
  • usage: "The president's trip will substantiate good relations with the former enemy country"