Meaning of DURATION in English

DURATION

du ‧ ra ‧ tion AC /djʊˈreɪʃ ə n $ dʊ-/ BrE AmE noun [uncountable]

[ Date: 1300-1400 ; Language: Old French ; Origin: Latin durare 'to continue in existence' ]

the length of time that something continues:

The course is of three years’ duration.

for the duration (of something)

The package includes cycle hire for the duration of your holiday.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.