1. Not accessible to view
   "out of sight damage"; "in stormy weather the stars are out of sight"
   - concealed, hidden

1. No longer visible
   "the ship disappeared behind the horizon and passed out of sight"
   - out of view 
2. Quietly in concealment
   - doggo, in hiding

See also: invisible, unseeable

• lumbar nerve
• lumbar pain
• lumbar plexus
• lumbar puncture
• lumbar vein
• lumbar vertebra
• lumber
• lumber jacket
• lumber room
• lumberer
• lumbering
• lumberjack
• lumberman
• lumberman's saw
• lumbermill
• lumberyard
• lumbosacral
• lumbosacral plexus
• lumbus
• lumen
• Luminal
• luminance
• luminance unit
• luminary
• luminesce