• (a.) Not dubitable or doubtful; too evident to admit of doubt; unquestionable; evident; apparently certain; as, an indubitable conclusion. • (n.) That which is indubitable. Found on http://thinkexist.com/dictionary/meaning/indubitable/
In·du'bi·ta·ble adjective [ Latin indubitabilis : confer French indubitable . See In- not, and Dubitable .] Not dubitable or doubtful; too evident to admit of doubt; unquestionable; evident; apparently certain; as, an indubitable conclusion. -- ... Found on http://www.encyclo.co.uk/webster/I/47