Synonyms: clearance
Definition: permission to proceed
Usage: the plane was given clearance to land
Similar words: permission, permit, license
Definition: the act of giving a formal (usually written) authorization
Synonyms: clearance
Definition: the distance by which one thing clears another; the space between them
Similar words: separation, interval
Definition: the distance between things
Usage: fragile items require separation and cushioning
Synonyms: clearance, headroom, headway
Definition: vertical space available to allow easy passage under something
Similar words: elbow room, room, way
Definition: space for movement
Usage: room to pass; make way for; hardly enough elbow room to turn around