English definition of “outgrow”
/ˌaʊtˈgrəʊ/ verb [T] (past tense outgrew, past participle outgrown)
TOO BIG › to grow too big for something: He's already outgrown these shoes. The company has outgrown this building.
NOT SUITABLE › to develop so that something is not now suitable: She's outgrown her current job and needs a new challenge.