second

v. support a proposal or statement; support or side with another person; endorse, approve; help, assist; send a worker to work temporarily in another place (for the purposes of replacing other employees or for increasing the number of workers or to exchange skills)

adv. in the second place, secondly

adj. next after the first; alternate; other; additional; subordinate, having a lower rank

n. 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

The second (SI symbol: s), sometimes abbreviated sec., is the name of a unit of time, and is the International System of Units (SI) base unit of time.SI prefixes are frequently combined with the word second to denote subdivisions of the second, e.g., the millisecond (one thousandth of a second) and nanosecond (one billionth of a second). Though SI prefixes may also be used to form multiples of the second (such as “kilosecond,” or one thousand seconds), such units are rarely used in practice. More commonly encountered, non-SI units of time such as the  minute, hour, and day increase by multiples of 60 and 24 (rather than by powers of ten as in the SI system).
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Noun
1. 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
(synonym) sec, s
(hypernym) time unit, unit of time
(hyponym) leap second
(part-holonym) minute, min
(part-meronym) millisecond, msec
2. an indefinitely short time; "wait just a moment"; "it only takes a minute"; "in just a bit"
(synonym) moment, minute, bit
(hypernym) time
(hyponym) blink of an eye, flash, heartbeat, instant, jiffy, split second, trice, twinkling, wink, New York minute
3. the fielding position of the player on a baseball team who is stationed near 2nd base
(synonym) second base
(hypernym) position
(member-holonym) baseball team
4. a particular point in time; "the moment he arrived the party began"
(synonym) moment, minute, instant
(hypernym) point, point in time
(hyponym) climax, culmination
5. following the first in an ordering or series; "he came in a close second"
(hypernym) rank
(hyponym) latter
6. a 60th part of a minute of arc; "the treasure is 2 minutes and 45 seconds south of here"
(synonym) arcsecond
(hypernym) angular unit
(part-holonym) minute, arcminute, minute of arc
7. the official attendant of a contestant in a duel or boxing match
(hypernym) attendant, attender, tender
8. a speech seconding a motion; "do I hear a second?"
(synonym) secondment, endorsement, indorsement
(hypernym) agreement
(derivation) back, endorse, indorse
9. the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle; "he had to shift down into second to make the hill"
(synonym) second gear
(hypernym) gear, gear mechanism
(part-holonym) motor vehicle, automotive vehicle
10. merchandise that has imperfections; usually sold at a reduced price without the brand name
(synonym) irregular
(hypernym) merchandise, wares, product
Verb
1. give support or one's approval to; "I'll second that motion"; "I can't back this plan"; "endorse a new project"
(synonym) back, endorse, indorse
(hypernym) support, back up
(verb-group) back, endorse, indorse, plump for, plunk for, support
(derivation) secondment, endorsement, indorsement
2. transfer an employee to a different, temporary assignment; "The officer was seconded for duty overseas"
(hypernym) transfer, reassign
(derivation) secondment
Adjective
1. coming next after the first in position in space or time or degree or magnitude
(synonym) 2nd, 2d
(similar) ordinal
2. coming next after first; "a second chance"; "the second vice president"
(similar) intermediate
3. a part or voice or instrument or orchestra section lower in pitch than or subordinate to the first; "second flute"; "the second violins"
(antonym) first
(classification) music
4. having the second highest gear ratio; "second gear"
(similar) forward
Adverb
1. in the second place; "second, we must consider the economy"
(synonym) secondly

adj. second, alternate

n. second, first mate, runner up

pron. second