a Roland for an Oliver

== English == === Etymology === From the stories of Roland and Oliver, legendary knights of equal might. === Noun === a Roland for an Oliver (plural Rolands for Olivers) (idiomatic) Equal measure; measure for measure; adequate response. ==== Synonyms ==== eye for an eye tit for tat === Adverb === a Roland for an Oliver (not comparable) (idiomatic, not comparable) So as to respond to an action with an equivalent action; tit for tat.