Definition

 (verb)
1. to foreshadow vaguely : intimate
2. to suggest, disclose, or outline partially
3. overshadow, obscure
In Context

“His temper and tendency to violence, adumbrated in the first part of the book, lead not only to his decline as a journalist but also his inability to maintain relationships with the various women he encounters.” 

Gerald Early, The Washington Post, 2015