1. a temporary loss of consciousness or vision caused by sudden loss of blood pressure to the brain, often experienced by pilots or astronauts during rapid acceleration
Usage: aviation; medical
2. a visual effect in which part of a screen or interface becomes dimmed or disabled to indicate unavailability
Usage: computing; user interface

1. to cause a temporary loss of consciousness or vision due to reduced blood flow to the brain
Usage: aviation; medical
2. to dim or disable part of a screen or interface to show that it is unavailable
Usage: computing; user interface

Examples

• The pilot experienced a grayout during the high-G maneuver.
• Astronauts train to handle grayout conditions in the centrifuge.
• The application will grayout the submit button until all required fields are filled.
• The interface grayed out the menu options that were not available in this mode.
• Rapid acceleration can cause a grayout if blood pressure drops suddenly.
• The system will grayout disabled features to prevent user confusion.