Longman Dictionary of Contemporary English - astray

~ adv 1 go astray a) to become lost  (One of the documents has gone astray.) b) humorous to start behaving in an immoral way 2 lead sb astray a) often humorous to encourage someone to do bad or immoral things that they would not normally do  (His mother worries that the older boys will lead him astray.) b) to make someone believe something that is not true  (It's easy to be led astray by the reports in the papers.)