open its doors v. phr. 1. To allow someone or something to enter or join; become open.
That college was started for women only, but a few years ago it opened its doors to men. 2. To begin doing business; open.
Proffitts Department Store is having a birthday sale; it first opened its doors fifty years ago this month. Antonym: CLOSE ITS DOORS.
[TahlilGaran] English Idioms Dictionary ▲