1. To a crucial degree
   "crucially important"; "crucially, he must meet us at the airport"

See also: crucial

• flash camera
• flash in the pan
• flash lamp
• flash memory
• flash welding
• flash-forward
• flash-freeze
• flash-frozen
• flashback
• flashboard
• flashboarding
• flashbulb
• flashcard
• flasher
• flashflood
• flashgun
• flashily
• flashiness
• flashing
• flashlight
• flashlight battery
• flashlight fish
• flashover
• flashpoint
• flashy