all out adverb 3adjective 4 adverb3 •With maximum effort. •Without regard for risk. •(US, Australia) Altogether; by far.Oh, bedad! He was all out the worst sight ever came across ould Ireland — 1840 adjective4 •Using every available means.They were planning to launch an all-out attack against the enemy. •Covering all aspects without exception.This book is an all-out examination of a very important issue in our community. •Synonym of out (“having depleted stocks”) (intensive but synonymous).—Do you have any more of those heirloom tomatoes? —Sorry, we're all out. •The state of a side having no more men to bat, thus ending its innings.