1. sketchily indicate something: to give an incomplete or faint outline or indication of something
2. foreshadow something: to give a vague indication or warning of something to come
[Late 16th century. < Latin adumbrat-, past participle of adumbrare "overshadow" < umbra "shade"]
Adumbrate. Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. http://encarta.msn.com/dictionary_/adumbrate.html (accessed: May 1, 2009).
I had a long humorous example but it is getting late, so let me just adumbrate; Bob did something which exemplified the usage of this week's word. It was a very witty example and you all thought I was a genius!