1. (of space) far, long; extended, prolonged. (wiktionary.org)
2. (of time) long; tedious, laborious; long duration, continuance. (wiktionary.org)
3. (of speech or writing) long-winded, lengthy. (wiktionary.org)
4. great, vast, spacious. (wiktionary.org)
5. remote, distant, far off. (wiktionary.org)
Word origin: Latin word meaning long hence, longissimus (superlative), “the longest.”