Perhaps luffy looked it up in a dictionary that didn't list seconds -- such as ours (the Search box). We don't require members to look up words in every dictionary, nor to be able to sort out the differences in definitions for words that have a variety of definitions, such as the simple "second."
Well, maybe you should. What's the point of asking about something that can be easily found on the Internet? But I'm just a mediocre EFL teacher. I'm no expert here, dear Copyright.
To luffy: just google "seconds definiton"
All right, not in every dictionary, but it takes less than a few minutes to refer to at least two or three other sources to find the right definition. Just a little bit of some effort on the part of the poster....