1. A law designed to regulate commercial business on Sunday.
2. One of a body of laws in colonial New England designed to enforce certain moral standards and particularly to prohibit specified forms of entertainment or recreation on Sundays.

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.