from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A week; any period of seven consecutive days and nights.
from the GNU version of the Collaborative International Dictionary of English
- n. A week; any period of seven consecutive days and nights. See sennight.
from The Century Dictionary and Cyclopedia
- n. The period of seven days and nights; a week, or the time from one day of the week to the next day of the same denomination preceding or following. See sennight.
From the Middle English sēven-night, from the Old English seofon ("seven") + nihta (the genitive plural form of niht, “night”); equivalent to seven + night; compare the Modern English noun fortnight and the Old English adjective seofonnihte. (Wiktionary)