Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia.
As soon as someone or something is or can be seen. Police have orders to shoot the suspect on sight.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Also, at sight. Immediately upon seeing, as in The soldiers threatened to shoot looters on sight, or He's able to multiply those three-digit figures at sight. [Second half of 1400s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
do something on ˈsightdo or feel something as soon as you see somebody/something: She complained constantly about the hotel, which she hated on sight. ♢ The soldiers were ordered to shoot on sight.
Farlex Partner Idioms Dictionary © Farlex 2017
Immediately upon being seen: threatened to shoot looters on sight.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.