Emily Dickinson Lexicon

long (-er, -est), adv. [see long, adj.]

1. Much time; many hours.
2. For a lengthy period.
3. Much; well; a lot; throughout the duration of.
4. Great amount of time.
5. Phrase. “all day long” / ”all summer long”: the entire day; for the duration of the summer.
6. Phrase. “Long ago”: many years hence; in the distant past.
7. Phrase. “How long”: for what amount of time.
8. Phrase. “the longest”: for the most lengthy duration; for the greatest amount of time.
9. Phrase: “So long”: good-bye; farewell; until we meet again, no matter the duration of absence.
10. Phrase: “long interceding lips”: lips employed in lengthy pleading; [metonymy] people who have been praying for an extensive period.