octave (EN)

noun

noun “octave”

1. (in music) the difference in sound between two notes where one is twice or half as high in pitch as the other
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   When she played the piano, her left hand stayed on middle C while her right hand moved up an octave.
2. (in fencing) a defensive position where the fencer holds their sword at waist height and points the tip straight out at knee level
   During practice, the coach emphasized the importance of mastering the octave to effectively block low attacks.
3. (the Latin rite in the Catholic Church) the day that comes exactly one week after a major religious celebration or feast day
   The church held a special service on the octave of Easter, exactly one week after the main celebration.
4. (in the Latin rite of the Catholic Church) the period of eight days that starts with a feast day
   The church celebrated the octave of Easter with special prayers and services each day for eight days.