the long, thin part on some clocks and watches that shows how many seconds have passed秒针
B1 not new; having been used in the past by someone else旧(的);二手(的)
More examples
a second-hand car dealer
Did you buy your bike new or second-hand?
We've just bought a second-hand piano.
I bought a job lot of second-hand children's books.
There's a flourishing trade in second-hand video machines.
See also: first/second/third hand
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