[sek-uh
nd hand for 1; sek-uhnd hand for 2, 3] 
| 1. | the hand that indicates the seconds on a clock or watch. |
| 2. | an assistant or helper, as to a worker or foreman. |
| 3. | at second hand, from or through an intermediate source or means; secondhand: She had the news at second hand. |
at second hand
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.