1. not fixed in place; loose or movable
2. not having gone below the horizon
Usage: used of the sun or moon

1. to reverse a previous setting or configuration
Usage: computing; technical

Examples

• The gemstone was unset from its mounting.
• The concrete remained unset after several hours.
• The unset sun cast long shadows across the field.
• You need to unset that variable before running the program.
• The jeweler carefully removed the unset diamonds.
• Make sure to unset the alarm before leaving.
• The unset moon was still visible in the morning sky.