1. Subject to being kept in possession of or continue to have: It was possible for Mr. and Mrs. Johnson to sell the house to the new owners, but the property and the large amount of land surrounding the house were retainable and kept in the Johnson family.
2. Able to keep in mind: The memories Lynn had of her parents were retainable because everytime she looked at the photos of them on her desk she remembered all the lovely times she had had with them.