Within checking theory of the Minimalist Program, feature F1 located on a head X is in a checking configuration with feature F2 located on head Y, if Y is adjoined to X, or YP is in a specifier of X. Formally, F1 is in a checking configuration with F2 if F2 is in the checking domain of F1.
Checking configuration in Utrecht Lexicon of Linguistics
- Chomsky, Noam A. 1995. The Minimalist program. Cambridge, MA: MIT Press.