on guard
on (one's) guard
Especially careful or vigilant; prepared for danger or surprises. He's got a lot of tricky moves, so be on your guard! Those trails can be a bit treacherous to climb. I just hope she's on her guard.
See also: guard, on
Farlex Dictionary of Idioms.
*on (one's) guard (against someone or something)
alert against someone or something. (*Typically: be ~; keep ~; remain ~; stay ~.) Try to stay on guard against pickpockets. I am always on my guard. Be on guard when you go into the city.
See also: guard, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
on (one's) guard
Alert and watchful; cautious.
See also: guard, on
American Heritage® Dictionary of the English Language, Fifth Edition.
- on (one's) guard
- on one's guard
- on your guard
- always be on (one's) guard
- off (one's) guard
- off guard
- off your guard
- catch (one) off guard
- catch off guard
- catch one off