1. Not bound by rule or law or convention
   "bewildered by the old go-as-you-please liberty of alliterative rhythm"

See also: unconventional

• ultimateness
• ultimatum
• ultimo
• ultimogeniture
• ultra
• ultra vires
• ultra-high
• Ultracef
• ultracentrifugation
• ultracentrifuge
• ultraconservative
• ultrahigh frequency
• ultraism
• ultramarine
• ultramarine blue
• ultramicroscope
• ultramicroscopic
• ultramodern
• ultramontane
• ultramontanism
• ultramundane
• ultranationalism
• ultranationalistic
• ultrasonic
• ultrasonically