To corroborate is to back someone else’s story. If you swear to your teacher that you didn't throw the spitball, and your friends corroborate your story by promising that you were concentrating on math homework, she might actually believe you.

For example, a witness in court corroborates the testimony of others, and further experimentation can corroborate a scientific theory. Near synonyms are substantiate and confirm. Corroborate, originally meaning "to support or strengthen," was borrowed from Latin corrōborāre, formed from the prefix cor- "completely" plus rōborāre "to strengthen" (from rōbur "strength").

Definitions of corroborate
  1. verb
    give evidence for
    synonyms: validate
    see moresee less
    give circumstantial evidence for
    type of:
    confirm, reassert
    strengthen or make more firm
  2. verb
    support with evidence or authority or make more certain or confirm
    synonyms: bear out, support, underpin
    see moresee less
    type of:
    agree, check, correspond, fit, gibe, jibe, match, tally
    be compatible, similar or consistent; coincide in their characteristics
  3. verb
    establish or strengthen as with new evidence or facts
    synonyms: affirm, confirm, substantiate, support, sustain
    see moresee less
    contradict, negate
    prove negative; show to be false
    show 14 types...
    hide 14 types...
    back, back up
    establish as valid or genuine
    give supporting evidence
    confirm the truth of
    demonstrate, establish, prove, shew, show
    establish the validity of something, as by an example, explanation or experiment
    support or supply with references
    prove valid; show or confirm the validity of something
    check, check off, mark, mark off, tick, tick off
    put a check mark on or near or next to
    ascertain, assure, check, control, ensure, insure, see, see to it
    be careful or certain to do something; make certain of something
    verify by consulting a source or authority
    prove oneself
    show one's ability or courage
    prove formally; demonstrate by a mathematical, formal proof
    specify the origin of
    contradict, negate
    prove negative; show to be false
    prove to be of unsound mind or demonstrate someone's incompetence
Word Family