C-command

 

C-command (for constituent command) is relation that holds between a node and its sister nodes and all the nodes that they dominate. The basic definition is:

A node X c-commands a node Y, if the node that immediately dominates X also dominates Y.

C-command is useful in modification, antecedent-anaphor coindexation, government, and other functions.

In syntax c-command must be modified to read:

A node X c-commands a node Y, if the node that immediately dominates the maximal projection of X also dominates Y.