What is the meaning of substantiating?

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, substantiate, 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, substantiate
• Make real or concrete; give reality or substance to.
  • usage: "our ideas must be substantiated into actions"
  • synonyms: realize, realise, actualize, actualise, substantiate
• Solidify, firm, or strengthen.
  • usage: "The president's trip will substantiate good relations with the former enemy country"
  • synonyms: substantiate

adjective

• Serving to support or corroborate.
  • usage: "collateral evidence"
  • synonyms: collateral, confirmative, confirming, confirmatory, corroborative, corroboratory, substantiative, validating, validatory, verificatory, verifying