Tuck away Definition 1 of 2Pro Tip 1/3Safety or Secrecy Used when protecting something from being found or accessed by others. She tucked away her diary where no one could find it. Pro Tip 2/3Future Use Often implies saving or preserving something for later use or reference. He tucked away some money for the holidays. Pro Tip 3/3Figurative Meaning Can be used metaphorically to describe memories or knowledge being kept safe in one's mind. She tucked away the happy memories from her childhood.