1 Urban Dictionary is a Web-based dictionary of slang words and phrases. , the site contains over 5.01 million definitions. Submissions are regulated by volunteer editors and rated by site visitors. ( by far my favourite one â click here and check out why)
Definition of pin (all) one's hopes on. : to hope very much that (something) will help one or allow one to succeed cancer patients pinning their hopes on a new drug You shouldn't pin all your hopes on getting the job. Word by Word Definitions. Seen and Heard.
Not to be confused with National identification number. Personal identification number shown in a PIN mailer. A personal identification number (PIN, pronounced pin; often redundantly PIN number) is a numeric password shared between a user and a system, that can be used to authenticate the user to the system.