1. In theory; according to the assumed facts 
2. In a theoretical manner
   "he worked the problem out theoretically"

See also: theoretical

Antonym: empirically

• stoplight
• stopover
• stoppable
• stoppage
• stoppage time
• Stoppard
• stopped
• stopped-up
• stopper
• stopper knot
• stoppered
• stopping
• stopping point
• stopple
• stops
• stopwatch
• storage
• storage allocation
• storage area
• storage battery
• storage cell
• storage device
• storage locker
• storage medium
• storage ring