Tuck/tʌk/ Definition 1 of 7Pro Tip 1/2Securing Position Use 'tuck' when you need to secure something so it doesn't come undone or look messy. After making the bed, she tucked the corners of the sheets. Pro Tip 2/2Clothes Adjustment 'Tuck' is often used when discussing making oneself presentable by adjusting clothing. He tucked his shirt into his trousers for the job interview.