Second - Wikipedia The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and lastly to 60 seconds each, for a total of 24 × 60 × 60 = 86,400 seconds per day The current and formal definition in the International System of Units (SI) is more precise:
Second - Oxford Reference The ordinal number constituting number two in a sequence, coming after the first in time or order The word comes (in Middle English, via Old French) from Latin secundus ‘following, second’, from the base of sequi ‘follow’
second - Wiktionary, the free dictionary second (not comparable) Number- two; following after the first one with nothing between them The ordinal number corresponding to the cardinal number two quotations
second - WordReference. com Dictionary of English next after the first in place, time, or value: the second house from the corner next after the first in rank, grade, degree, status, or importance: the second person in the company