derived from what is primary or original; not firsthand
"a secondhand report"
"a secondhand account of a memory of something once read"
"most of our knowledge is secondhand"
Not new; previously owned and used by another.
"I bought a secondhand bicycle at the garage sale because it had already been ridden by someone else."
by indirect means
"I heard about it only secondhand or thirdhand"
"he prefers to buy secondhand"
In a used or previously-owned condition.
"I decided to buy a secondhand bicycle from the garage sale to save money on my morning commute."