Emily Dickinson Lexicon

SEC'OND, n.

1. One who attends another in a duel, to aid him, mark out the ground or distance, and see that all proceedings between the parties are fair. – Watts. Addison.
2. One that supports or maintains another; that which supports. Being sure enough of seconds after the first onset. – Wotton.
3. The sixtieth part of a minute of time or of a degree, that is, the second minute or small division next to the hour. Sound moves above 1140 English feet in a second.
4. In music, an interval of a conjoint degree, being the difference between any sound and the next nearest sound above or below it. – Busby. Encyc.