1. The distance by which one thing clears another; the space between them 
2. Vertical space available to allow easy passage under something
   - headroom, headway 
3. Permission to proceed
   "the plane was given clearance to land"

Derived forms: clearances

See also: clear

Type of: elbow room, interval, licence [Brit, Cdn], license [N. Amer], permission, permit, room, separation, way

Encyclopedia: Clearance

• push-down queue
• push-down stack
• push-down storage
• push-down store
• push-pull
• Pushan
• pushball
• pushcart
• pushchair
• pusher
• pushful
• pushily
• pushiness
• pushing
• Pushkin
• pushover
• pushpin
• Pushto
• Pushtun
• pushup
• pushy
• pusillanimity
• pusillanimous
• pusillanimously
• pusillanimousness