In hostile array refers to a situation where people, groups or armies are opposed to each other, ready for conflict or war. There are several synonyms for this phrase including in an aggressive formation, in combative alignment, in militant array, in battle mode, in offensive posture, and in warlike disposition. All of these synonyms imply a state of aggression and readiness to engage in conflict. Whether it be a verbal argument, physical altercation or full-scale war, the implication is that the opposing parties are prepared to fight. When we hear the phrase in hostile array, it is a warning that conflict is imminent and to be avoided if possible.