The second (s) is the base unit of time in the SI system of units, defined as the duration of 9,192,631,770 cycles of the radiation associated with a certain color of light emitted by the cesium atom
{i} unit of time equal to 1/60 of a minute; moment; person or thing that is next after the first (in rank, importance, etc.); second gear (in a motor vehicle); supporter of a proposal or statement; assistant; support for a proposal or statement
transfer an employee to a different, temporary assignment; "The officer was seconded for duty overseas"
a unit of time coming immediately after the first, in time or in some other ordering
One sixtieth of a minute which is one sixtieth of a degree which is one 360th of a circle Used in metes and bounds descriptions when astronomic bearings are used to describe directions
a speech seconding a motion; "do I hear a second?" the official attendant of a contestant in a duel or boxing match a 60th part of a minute of arc; "the treasure is 2 minutes and 45 seconds south of here" following the first in an ordering or series; "he came in a close second" 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites transfer an employee to a different, temporary assignment; "The officer was seconded for duty overseas" give support or one's approval to; "I'll second that motion"; "I can't back this plan"; "endorse a new project" having the second highest gear ratio; "second gear" coming next after first; "a second chance"; "the second vice president" a part or voice or instrument or orchestra section lower in pitch than or subordinate to the first; "second flute"; "the second violins" coming next after the first in position in space or time or degree or magnitude in the second place; "second, we must consider the economy
The interval between any tone and the tone which is represented on the degree of the staff next above it
A second is defined, as the time required for a cesium-133 atom to vibrate 9,192,631,770 times in a vacuum There are 60 second (sec) in a minute (min ), 60 min in an hour (h ), 24 hours in a day (one revolution around the Earth's axis), and 365 1/4 days in a year (yr : one full orbit around the Sun) This is why we have an extra day every four years, called leap year, so we can get caught up with time
A unit of angle equal to one-sixtieth of a minute of arc or one part in 3600 of a degree