Definition of "clearance" []

• The act or process of clearing. (noun)
• A space cleared; a clearing. (noun)
• The amount of space or distance by which a moving object clears something. (noun)
• The height or width of a passage: an underpass with a 13-foot clearance. (noun)
• An intervening space or distance allowing free play, as between machine parts. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In order to qualify for admission to medical school, generally speaking, an individual must be a middle school graduate-somewhat comparable to our high school graduation, have two years of work experience, then obtain clearance from the committee of the commune or factory that sent him to school."
• "The BMC and the charity commissioner's office records (available with DNA) show that the developers have not submitted the title clearance certificate and the commissioner has not given approval for the sale of the land."
• "I have to come back again for what they call a clearance for eye surgery."