pass Idioms pass away - to die His father passed away when he was 96 years old. pass for/as (someone or something) - to succeed in being accepted as someone or something The young woman was trying to pass for a reporter when she went to the concert. pass muster - to pass a test or checkup, to measure up to a certain standard The player was not able to pass muster and was not included on the team. pass off (something) as (something else) - to sell or give something by false claims, to offer something as genuine when it is not The man passed off the.