What does SECOND mean?

noun

1. 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
2. an indefinitely short time“wait just a moment”
3. the fielding position of the player on a baseball team who is stationed near the second of the bases in the infield
4. a particular point in time“the moment he arrived the party began”
5. following the first in an ordering or series“he came in a close second”
6. a 60th part of a minute of arc“the treasure is 2 minutes and 45 seconds south of here”
7. the official attendant of a contestant in a duel or boxing match
8. a speech seconding a motion“do I hear a second?”