Definitions of second:

• noun:   a speech seconding a motion

  Example: "Do I hear a second?"

• noun:   the official attendant of a contestant in a duel or boxing match
• noun:   a 60th part of a minute of arc

  Example: "The treasure is 2 minutes and 45 seconds south of here"

• noun:   following the first in an ordering or series

  Example: "He came in a close second"

• noun:   1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
• noun:   the fielding position of the player on a baseball team who is stationed near 2nd base
• noun:   merchandise that has imperfections; usually sold at a reduced price without the brand name
• noun:   the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle

  Example: "He had to shift down into second to make the hill"

• noun:   a particular point in time
• noun:   an indefinitely short time
• verb:   transfer an employee to a different, temporary assignment

  Example: "The officer was seconded for duty overseas"

• verb:   give support or one's approval to

  Example: "I'll second that motion"

• adjective:   coming next after the first in position in space or time or degree or magnitude
• adjective:   having the second highest gear ratio

  Example: "Second gear"

• adjective:   coming next after first

  Example: "A second chance"

• adjective:   a part or voice or instrument or orchestra section lower in pitch than or subordinate to the first

  Example: "Second flute"

• adverb:   in the second place

  Example: "Second, we must consider the economy"

• name:  A surname (very rare: popularity rank in the U.S.: #78420)