Longman Dictionary of Contemporary English - convenience

~ n 1 the quality of being suitable for a particular purpose, especially because it is easy to use or saves you time  (Many women prefer the convenience of working at home while their children are small. | for convenience)  (We bought this house for convenience; it's near the shops and the railway station.) 2 what is easiest and best for a particular person  (for sb's convenience)  (I'm not going to organize my day entirely for your convenience! | suit sb's convenience)  (We can call at your home at any time to suit your convenience. | at sb's convenience (=at a time that is best and easiest for someone))  (Meetings are always arranged at the management's convenience and staff are expected to fit in.) 3 at your earliest convenience formal as soon as possible; usually in letters  (We should be grateful if you would reply at your earliest convenience.) 4 something that is useful because it saves you time or means that you have less work to do  (The supermarket offers a bag-packing service, as a convenience to customers.) 5 also public convenience C usually plural formal a public toilet 6 a marriage of convenience a marriage that has been agreed for a particular purpose, not because the two people love each other  (In the past most royal marriages were marriages of convenience, arranged for political reasons.)