In‐du″bi‐ta‐ble (?), a. [L. indubitabilis: cf. F. indubitable. See In- not, and Dubitable.] Not dubitable or doubtful; too evident to admit of doubt; unquestionable; evident; apparently certain; as, an indubitable conclusion. — n. That which is indubitable.
Syn. — Unquestionable; evident; incontrovertible; incontestable; undeniable; irrefragable.