Wordnet 3.0
NOUN (3)
1. 
 an aggressive attempt to compel acquiescence by the concentration or manipulation of power; 
- Example: "she laughed at this sexual power play and walked away"[syn: power play, squeeze play, squeeze]
2.  a play in which there is a concentration of players in one location on the field of play; 
- Example: "they used a power play to return the kickoff"
3.  (ice hockey) a play in which one team has a numerical advantage over the other as a result of penalties; 
- Example: "the team was unable to capitalize on the power play"
WordNet (r) 3.0 (2006):
power play
    n 1: an aggressive attempt to compel acquiescence by the
         concentration or manipulation of power; "she laughed at
         this sexual power play and walked away" [syn: power play,
         squeeze play, squeeze]
    2: a play in which there is a concentration of players in one
       location on the field of play; "they used a power play to
       return the kickoff"
    3: (ice hockey) a play in which one team has a numerical
       advantage over the other as a result of penalties; "the team
       was unable to capitalize on the power play"