the GNU version of the Collaborative International Dictionary of English
ad. While.
The Century Dictionary and Cyclopedia
Same as while, or whiles, in all its senses.
In the mean time.
Word Usage
"Do it for a term whilst grooming a good successor on (or especially put onto) the GLA and, if you do a good job, you will be rewarded with a place in a future Cabinet, future (elected or unelected) Upper House etc, whatever you want."