Noun

• S: (n) second, sec, s (1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites)
• S: (n) moment, mo, minute, second, bit (an indefinitely short time) "wait just a moment"; "in a mo"; "it only takes a minute"; "in just a bit"
• S: (n) second base, second (the fielding position of the player on a baseball team who is stationed near the second of the bases in the infield)
• S: (n) moment, minute, second, instant (a particular point in time) "the moment he arrived the party began"
• S: (n) second (following the first in an ordering or series) "he came in a close second"
• S: (n) second, arcsecond (a 60th part of a minute of arc) "the treasure is 2 minutes and 45 seconds south of here"
• S: (n) second (the official attendant of a contestant in a duel or boxing match)
• S: (n) second, secondment, endorsement, indorsement (a speech seconding a motion) "do I hear a second?"
• S: (n) second gear, second (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"
• S: (n) irregular, second (merchandise that has imperfections; usually sold at a reduced price without the brand name)

Verb

• S: (v) second, back, endorse, indorse (give support or one's approval to) "I'll second that motion"; "I can't back this plan"; "endorse a new project"
• S: (v) second (transfer an employee to a different, temporary assignment) "The officer was seconded for duty overseas"

Adjective

• S: (adj) second, 2nd, 2d (coming next after the first in position in space or time or degree or magnitude)
• S: (adj) second (a part or voice or instrument or orchestra section lower in pitch than or subordinate to the first) "second flute"; "the second violins"

Adverb

• S: (adv) second, secondly (in the second place) "second, we must consider the economy"