Top definition
1. The best possible conditions for any activity.
2. A situation where the potential for achievement has no limit.
Taken from the aeronautical term for optimum flying conditions. Also the meteorological term for clear skies with visibility in excess of 20 miles.
by Lionel Mandrake January 22, 2004
Get the mug
Get a Ceiling Unlimited mug for your sister-in-law Larisa.