升级shēng∥jí 1.从较低的等级或班级升到较高的等级或班级{go up one or more grades}: 产品～换代{updating and upgrading of products}|考试及格,方可～。{One can not go up to a higher grade without passing the examinations.} 2.指战争的规模扩大、事态的紧张程度加深等{escalate; expand step by step, as from a local confrontation into a general war}: 战争～。{escalation of a war}