Verb
boldly go where no man has gone before (third-person singular simple present boldly goes where no man has gone before, present participle boldly going where no man has gone before, simple past boldly went where no man has gone before, past participle boldly gone where no man has gone before)
(idiomatic) To break new ground.
These are the voyages of the starship Enterprise. Its five year mission... to boldly go where no man has gone before. Gene Roddenberry