Terms used in this chapter, unless the context otherwise plainly requires, shall mean:
(1) "Lessee," a person contracting with the lessor for the use of a safe deposit box;
(2) "Lessor," a bank or branch bank which engages in the business of renting safe deposit facilities;
(3) "Safe deposit box," a box, vault, or other receptacle maintained by a lessor in its vault and the purpose of which is to secure the property of a lessee.