say it: AHK-tiv
octave is a noun meaning "a feast day and the seven days following it". It carries 3 recorded senses.
a feast day and the seven days following it
a musical interval of eight tones
a rhythmic group of eight lines of verse
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 octave 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.