1. Used of petrol; having a high octane number 
2. Vigorously energetic or forceful
   "a high-octane sales manager"; "a high-octane marketing plan"
   - high-powered, high-power, high-voltage, high-energy

See also: dynamic, dynamical, efficient

• monument
• monumental
• monumentalise
• monumentalize
• monumentally
• Monégasque
• moo
• moo goo gai pan
• moo-cow
• mooch
• moocher
• mood
• moodily
• moodiness
• moody
• moola
• moolah
• mooli
• moon
• moon about
• moon around
• moon blindness
• moon carrot
• moon daisy
• moon on