v. to assess again; to revise an earlier assessment; to reevaluate
The Century Dictionary and Cyclopedia
To assess again.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. revise or renew one's assessment
Word Usage
"But in a follow-up Tweet on Tuesday, Cain's Twitter account read: The definition of reassess is: To consider again, esp. while paying attention to new factors."