1 the length of time for which something continues.
2 a specified length of time (after the duration of a minute).
Phrases and idioms:
for the duration
1 until the end of the war.
2 for a very long time.
Derivatives:
durational adj.
Etymology: ME f. OF f. med.L duratio -onis (as DURANCE)
Useful english dictionary. 2012.