If you say as one door closes, another one opens or one door closes and another one opens, you mean that if one thing you do fails, you will soon have an opportunity to try to succeed at something else. This deal replaces the account they lost in March. `As one door closes another one opens,' chief executive Hamish McLennan said yesterday. Roberts was philosophical after losing his job. `Obviously, I am a little disappointed,' he explained, `But one door closes and another one opens.' Note: This expression is often used to encourage someone to keep trying after they have had a disappointment or failure.