Outgrow/ˌaʊtˈɡrəʊ/ Definition 1 of 2Pro Tip 1/3Literal Growth Used to describe physical growth, such as becoming too big for clothes or spaces. She quickly outgrew her school uniform. Pro Tip 2/3Beyond Capacity Implies something is no longer sufficient to accommodate growth, often forcing a change. The startup outgrew its office space. Pro Tip 3/3Eclipse in Growth Can suggest surpassing another in development, like in sibling or peer comparisons. The younger athlete outgrew his older rivals in skill.