on your honour

on (one's) honor

1. With utmost sincerity; with one's serious promise or oath. Primarily heard in US. On my honor, I swear to you that I did not steal that money! If, on your honor, you promise to behave yourself, I'll let you go to the party with your friends.
2. With a sincere intent (to do something) without being watched or scrutinized; according to the honor system. Primarily heard in US. To save on the cost of employing daytime staff to mind the till, we ask patrons on their honor to leave the correct payment for their items before leaving the shop.
See also: honor, on

on (one's) honour

1. With utmost sincerity; with one's serious promise or oath. Primarily heard in UK, Australia. On my honour, I swear to you that I did not steal that money! If, on your honour, you promise to behave yourself, I'll let you go to the party with your friends.
2. With a sincere intent (to do something) without being watched or scrutinized; according to the honour system. Primarily heard in UK, Australia. To save on the cost of employing daytime staff to mind the till, we ask patrons on their honour to leave the correct payment for their items.
See also: honour, on
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

on your ˈhonour

(old-fashioned)
1 used to promise very seriously that you will do something or that something is true: I swear on my honour that I knew nothing about this.
2 be trusted to do something: You’re on your honour not to go into my room.
See also: honour, on
Farlex Partner Idioms Dictionary © Farlex 2017
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