definition of
corroborate

[1] #1 corroborate v. [confirm, sustain, substantiate, support, affirm] establish or strengthen as with new evidence or facts; "his story confirmed my doubts"; "The evidence supports the defendant". wn

[2] #2 corroborate v. [validate] give evidence for. wn

[3] #3 corroborate v. [underpin, bear out, support] support with evidence or authority or make more certain or confirm; "The stories and claims were born out by the evidence". wn