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

second: [adjective] next to the first in place or time. next to the first in value, excellence, or degree. inferior, subordinate. ranking next below the top of a grade or degree in authority or precedence. alternate, other. resembling or suggesting a prototype : another. being the forward gear or speed next higher than first in a motor vehicle.

The second (symbol: s) is the unit of time in the International System of Units (SI), historically defined as 1⁄86400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of ...

1. a : a unit of time that is equal to ¹/₆₀ of a minute. There was a delay of several seconds. a 30- second TV commercial. phone lines transmitting data at 1,200 bits per second. The sound came on for a second or two and then went off again. b informal : a very brief period of time.

Synonyms for SECOND: minute, moment, heartbeat, instant, split second, nanosecond, trice, jiffy; Antonyms of SECOND: age, lifetime, forever, eternity, eon, aeon ...

a. Repeating an initial instance: a second chance. b. Reminiscent of one that is well known: a second George Washington; a second Waterloo. c. Alternate; other: every second year. 3. Inferior to another; subordinate: second vice president at the bank; a leader second to none.

21 thg 1, 2023 · The second was used initially as a minimum calculation of time. But the evolution of time makes certain corrections to this concept. As of now, second is one of the fundamental units of time. You can find second definition Physics in terms of the radiation frequency. From previous concepts, second was used to define 1/86,400 of the mean solar ...

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 was formerly defined as 1/86,400 of the mean solar day—i.e., the average period of rotation of the Earth on its axis relative to the Sun. In the mid-20th century this definition became inadequate because of the need for …

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There is a difference between “I second that” and “I second this”. “I second that” is used in casual conversation. “I second this” more so refers to seeing a plan or an idea in writing, and agreeing with it. Here’s an example you’ll appreciate: Let’s scope out the terrain first. I second that, let’s go. In this case, the ...