the GNU version of the Collaborative International Dictionary of English
ad. In a vanishing manner; imperceptibly.
The Century Dictionary and Cyclopedia
In an evanescent or vanishing manner.
Word Usage
"Oddly, while one somewhat older woman is as evanescently noticeable as a wisp of exhaust, two somewhat older women together are solid enough to be greeted with “bless your hearts” followed by “dearie.”"