Definition of on guard in English:
1On duty to protect or defend something.
- Some of the men had slipped away from the forward trenches, presumably those who were not actually meant to be on guard or patrol duty.
- There would be no one on guard to protect the town from the Bandits.
- Things soured after a six-year-old girl hurt herself when the dog on guard chased her in a bid to protect its family.
1.1 (also on one's guard) Prepared for any contingency; vigilant: we must be on guard against such temptation
More example sentences
- Growing up in the UK, it took me twenty-two long years to feel secure enough to adopt the feminist label, and even then I was always on my guard, prepared for the usual assumption that I was a bit odd.
- It has alerted us to be continually on our guard hence security at airports and elsewhere.
- I find myself constantly on my guard while shopping for fear of muggers, on foot or cycle.
Definition of on guard in:
- British & World English dictionary
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