As a Noun: 1. Something put into a secret place. Informal English = stash. Formal English = cache. 2. The act of collecting money by not spending it, or the money itself. English = saving, savings. 3. A collection of gold or silver objects, jewels or other valuable things, which has been hidden. English = treasure. As a Verb or Adjective: 1. To put something in a secret place, usually in order to keep it safe. English = hide, hide away, conceal. Informal English = stash. Idiomatic English = put out of sight, shut away. Formal English = secrete. 2. To put money away in a bank account or a secret hiding place. English = save.