1. grow too large or too mature for

- I have outgrown these clothes

- She outgrew her childish habits

Definition categories: change, develop, grow

2. grow faster than

Definition categories: competition, exceed, outdo, outgo, outmatch, outperform, outstrip, surmount, surpass

Sentences with outgrow as a verb:

- Poor boys often have to wear whatever a big brother has outgrown.

- The best adapted plant varieties tend to outgrow the other.