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.
SECOND meaning: 1. immediately after the first and before any others: 2. the position in which a person finishes a. Learn more.
SECOND definition: next after the first; being the ordinal number for two. See examples of second used in a sentence.
You say second when you want to make a second point or give a second reason for something. The soil is depleted first by crops grown in it and second by bacterial action.
The meaning of SECOND is next to the first in place or time. How to use second in a sentence.
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