A second is directly part of other units, such as frequency measured in hertz (inverse seconds or s −1), speed in meters per second, and acceleration in meters per second squared.

Dec 6, 2016 · The meaning of SECOND is next to the first in place or time. How to use second in a sentence.

Dec 30, 2025 · 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 definition: 1. immediately after the first and before any others: 2. the position in which a person finishes a…. Learn more.

1. In the second order, place, or rank: finished second. 2. But for one other; save one: the second highest peak.

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.

A second is a unit of time, and one of the sixty parts that a minute is divided into.

SECOND meaning: 1 : occupying the number two position in a series; 2 : next to the first in importance or rank

SECOND definition: to transfer (a military officer, official, or employee) to another organization for temporary duty. See examples of second used in a sentence.

In science, a second is the time it takes for a caesium atom to vibrate 9,192,631,770 (around 9 billion) times. Scientists measure the second this way because the length of a day changes all the time.