from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not in the period of most frequent or heaviest use: lower rates for telephone calls made during off-peak hours; travelers who take advantage of off-peak fares.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. During a period of less use or demand than the maximum (peak), generally overnight.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having less than maximal use or demand or activity; -- of a period of time occurring as a defined part of a time cycle.
Sorry, no etymologies found.