n.
October 31, celebrated in the United States, Canada, and the British Isles by children going door to door while wearing costumes and begging treats and playing pranks.
[Short for All Hallow Even : ALLHALLOW(MAS) + EVEN2.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
