out‧grow past tense outgrew past participle outgrown [transitive]
to grow too big for something [= grow out of]:
They outgrow their clothes so quickly.
Harry outgrew his cot when he was about two.
to no longer do or enjoy something that you used to do, because you have grown older and changed:
Most children eventually outgrow a tendency toward travel sickness.
if a business outgrows a building, it begins to have too many people or too much work to fit into the building:
His furniture-making business soon outgrew his garage.
to grow or increase faster than someone or something else:
a population outgrowing its resources