Received from some source other than the original. For example, I learned of Mary's divorce at second hand. This phrase may be applied to information or to previously owned merchandise. [1400s] Also see at first hand.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.