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ctr.

American  

abbreviation

  1. center.

CTR British  

abbreviation

  1. Control Traffic Zone: an area established around an airport to afford protection to aircraft entering or leaving the terminal area

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.