the GNU version of the Collaborative International Dictionary of English
ad. In a proverbial manner; by way of proverb; hence, commonly; universally
The Century Dictionary and Cyclopedia
In a proverbial manner or style; by way of proverb; as a proverb.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. in the manner of something that has become a byword
Word Usage
"Necessity, proverbially, is the mother of invention, and human responsiveness to necessity has regularly mothered the necessary inventions or brought about the necessary changes of direction."