In short and simple terms, "au" is a French word that means "to" or "at."
Sentences with «au»
I had four children in five years (there was no birth - control) and although I was fortunate to have a live - in au pair when they were young, she did nothing in the house. (remonline.com)
It's the True Dimensions Lipstick in Pink Cherie with the NouriShine Plus Lip Gloss in Au Naturel on top. (stilettosanddiapers.com)
Winner will be able to choose pattern for Bebe Au Lait muslin cover, size for NuzzleHUG, and pattern for The Nurse Purse. (happeningsoftheharperhousehold.net)