[intransitive] to increase in size, number, strength or quality The company profits grew by 5% last year. Fears are growing for the safety of a teenager who disappeared a week ago. There is growing opposition to the latest proposals. Shortage of water is a growing problem. The performance improved as their confidence grew. grow in something The family has grown in size recently. She is growing in confidence all the time. + adj. The company is growing bigger all the time.