Specifically, a period of ten years, beginning on January 1 of a year ending with a zero when written, and ending at midnight on December 31 of the year nine years later
A decade is a period of ten years, especially one that begins with a year ending in 0, for example 1980 to 1989. the last decade of the nineteenth century. a period of 10 years (décade, from dekas, from deka )
A 10: 1 increase or decrease of a variable, usually frequency A 20 dB/decade gain roll-off defines a gain change of 20 dB each 10-fold increase or decrease in frequency Note that 6dB/octave is equivalent to 20 dB/decade
a factor of ten; a time period of ten years The decade scaler gave out a pulse after every ten input pulses There will be two elections each decade
decadal
Hyphenation
de·ca·dal
Pronunciation
Etymology
[ 'de-"kAd, de-'kAd; esp sens ] (noun.) 15th century. Middle English, from Middle French décade, from Late Latin decad-, decas, from Greek dekad-, dekas, from deka.