The second (symbol: s) is a unit of time derived from the division of the day, first into hours, then into minutes, and lastly into seconds, for a total of 24 × 60 × 60 = 86 400 seconds per day. That definition, based on 1⁄86400 of a rotation of the Earth, is still used by the Universal Time 1 (UT1) system. The current and formal definition in the International System of Units (SI) is more ...

The meaning of SECOND is next to the first in place or time. How to use second in a sentence.

Ordinal numbers in English show the position or order of things—like first, second, third, and so on. They’re used all the time in everyday English, whether you’re talking about dates, competitions, floors in a building, or steps in a process. In this complete guide, you’ll learn how to form ordinal numbers, how to use them correctly in sentences, and how they’re different from ...

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Second Life's official website. Second Life is a free 3D virtual world and original metaverse where users can create, connect, and chat with others from around the world using voice and text.