from The American Heritage® Dictionary of the English Language, 4th Edition
- conj. Chiefly British While.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- conj. While, at the same time.
from the GNU version of the Collaborative International Dictionary of English
- adv. While.
from The Century Dictionary and Cyclopedia
- Same as while, or whiles, in all its senses.
- In the mean time.
Middle English whilest, alteration of whiles, whiles; see whiles.(American Heritage® Dictionary of the English Language, Fourth Edition)
From whiles + -t. Cognate with West Frisian wylst ("whilst"). More at whiles. (Wiktionary)