1. Operating at high speed
   "a high-velocity shell"
   - high-speed

See also: fast

• out-tray
• outage
• Outaouais
• outargue
• outback
• outbalance
• outbid
• outboard
• outboard motor
• outboard motorboat
• outbound
• outbrave
• outbreak
• outbred
• outbuilding
• outburst
• outcall
• outcast
• outcaste
• outclass
• outclassed
• outcome
• outcrop
• outcropping
• outcry