verb (used with object), sub·stan·ti·at·ed, sub·stan·ti·at·ing. to establish by proof or competent evidence: to substantiate a charge. to give substantial existence to: to substantiate an idea through action. to affirm as having substance; give body to; strengthen: to substantiate a friendship.

What is a substantiated position?

(substantiates 3rd person present) (substantiating present participle) (substantiated past tense & past participle )To substantiate a statement or a story means to supply evidence which proves that it is true.

What does Substantiative mean?

noun. evidence sufficient to establish a thing as true, valid, or real; proof: The department may require employees to provide vouchers, receipts, or other substantiation for any fees or expenses claimed.