Right to retain possession defined as a lien securing claims on property until demands are satisfied. A lien is a right to retain possession of another's property until present or accrued claims are satisfied, covering contractual, equitable, specific and general forms. It functions as a charge or security on property without transferring ownership; it is typically an unassignable personal right dependent on possession. Distinctive features separate lien from mortgage and pledge: lien depends on possession and secures satisfaction of demands, while mortgage and pledge create assignable proprietary or special interests.