(one's) door is always open(redirected from their door is always open)
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(one's) door is always open
One is always available to be of guidance, support, aid, or assistance whenever needed. Said especially by an employer or teacher to an employee or pupil. I know you've been going through some tough times lately, so if you ever need someone to talk to, I want you to know that my door is always open. Mrs. Spencer is a great teacher, and her door is always open if we ever have any questions or fall behind.