Technology / Rockets / Unrestricted: Refers to a free-standing grain which burns on all surfaces. This method leaves the chamber wall unprotected by propellant and is therefore seldom used.
Search Google for Unrestricted:
Life Style / Travel / Unrestricted Fare: An airfare that has no special advance purchase, saturday stay or certain days to travel requirements, and is usually refundable. Many full coach and most first-class fares are unrestricted. MORE
Entertainment / Basketball / Free Agent - Unrestricted: An NBA free agent who is not subject to the right of first refusal; he must have completed at least his 2nd contract and have more than 5 years in the NBA, or he must have been fired ('put on waivers' MORE