Also found in: Acronyms.
A standard written warning not to enter a particular piece of property. There were a bunch of "No Trespassing" signs at the abandoned factory, but we decided to go inside anyway.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
do not enter. (Usually seen on a sign. Not usually spoken.) The sign on the tree said, "No Trespassing." So we didn't go in. The angry farmer chased us out of the field shouting, "Get out! Don't you see the 'No Trespassing' sign?"
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.