From WordNet (r) 3.0 (2006) :
lead astray
v 1: teach immoral behavior to; "It was common practice to lead
off the young ones, and teach them bad habits" [syn: lead
off, lead astray]
2: lead someone in the wrong direction or give someone wrong
directions; "The pedestrian misdirected the out-of-town
driver" [syn: mislead, misdirect, misguide, lead
astray]
3: cause someone to believe an untruth; "The insurance company
deceived me when they told me they were covering my house"
[syn: deceive, betray, lead astray] [ant: undeceive]