1. A period of three years

Derived forms: triennia, trienniums

• Upper Volta
• upper-case letter
• upper-class
• upper-level
• upper-lower-class
• upper-middle-class
• Upper-Normandy
• uppercase
• uppercut
• uppermost
• uppish
• uppishly
• uppishness
• uppity
• uppityness
• UPPP
• Uppsala
• upraise
• upraised
• uprate
• uprear
• upright
• upright piano
• uprightly
• uprightness