say it: DUUR-ay-shuhn
duration is a noun meaning "the period of time during which something continues". It carries 3 recorded senses.
the period of time during which something continues
the property of enduring or continuing in time
continuance in time
“the ceremony was of short duration”
“he complained about the length of time required”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for duration come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.