circumstance environment,situation He was dissatisfied with all his circumstances. I don't remember all the circumstances of the quarrel. the conditions that affect a situation, action,event,etc The rules can only be waived in exceptional circumstances. Who could tell what his son's circumstances really were? under/in no circumstances under/in the circumstancescircumstance • environment, situation He was dissatisfied with all his circumstances. I don’t remember all the circumstances of the quarrel. • the conditions that affect a situation, action, event, etc The rules can only be waived in exceptional circumstances. Who could tell what his son’s circumstances really were? under/in no circumstances under/in the circumstances