Wordnet 3.0
VERB (1)
1. 
 control (others or oneself) or influence skillfully, usually to one's advantage; 
- Example: "She manipulates her boss"- Example: "She is a very controlling mother and doesn't let her children grow up"- Example: "The teacher knew how to keep the class in line"- Example: "she keeps in line"[syn: manipulate, keep in line, control]
WordNet (r) 3.0 (2006):
keep in line
    v 1: control (others or oneself) or influence skillfully,
         usually to one's advantage; "She manipulates her boss";
         "She is a very controlling mother and doesn't let her
         children grow up"; "The teacher knew how to keep the class
         in line"; "she keeps in line" [syn: manipulate, keep in
         line, control]