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.

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

SECOND definition: 1. immediately after the first and before any others: 2. the position in which a person finishes a…. Learn more.

SECOND definition: the sixtieth part of a minute of time. See examples of second used in a sentence.

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

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

Oct 15, 2025 · second, fundamental unit of time, now defined in terms of the radiation frequency at which atoms of the element cesium change from one state to another.

The second is the international standard unit (SI unit) for science. Celestial sphere -based: as in sidereal time, where the apparent movement of the stars and constellations across the sky is …

You're second on the list. This is my second piece of chocolate cake. She didn't win but she did come second (= was the one after the winner) in one race.

Second is used before superlative adjectives to indicate that there is only one thing better or larger than the thing you are referring to. The party is still the second strongest in Italy. You …