secondhand
1. adverb Indirectly, as opposed to from the original source. But I heard secondhand, so who knows if that information is actually true.
2. adjective Describing information that has been learned indirectly, as opposed to from the original source. I can't trust this secondhand gossip! Who was in the meeting and can tell us what really happened?
second hand
from another person or source, not directly from personal experience or observation. I wasn't present at the meeting. I heard about it at second hand. Frank tells stories about the Gulf War, but he got them second hand. He wasn't actually in the desert with the troops.