1. A period of 10 years
   "The company celebrated its decade with a grand party";
   - decennary [archaic], decennium
    
2. A set of ten items, especially a series of prayers in a rosary
   "She said a decade of the rosary"
    
3. (electronics) a device or circuit that scales or counts by tens
   "A decade counter"

Derived forms: decades

Type of: period, period of time, time period, time span

Part of: century

Encyclopedia: Decade