Entry 2 senses · 2 variants Webster, 1913 Indubitate · In·du·bi·tate · IPA /ɪnˈd(j)uːbɪteɪt/ a. v. t. 01 a. Not questioned or doubtful; evident; certain. 1. Not questioned or doubtful; evident; certain.[Obs.] 02 v. t. To bring into doubt; to cause to be doubted. 1. To bring into doubt; to cause to be doubted.[Obs.] “To conceal, or indubitate, his exigency.” — Sir T. Browne.