Definition of On guard

1. Adjective. Vigilant. "Must remain on your guard in such a situation"

Exact synonyms: On One's Guard, On Your Guard, Upon One's Guard
Similar to: Wary

Lexicographical Neighbors of On Guard

on all fours
on and off
on an individual basis
on an irregular basis
on approval
on average
on a higher floor
on a lower floor
on a regular basis
on base
on camera
on duty(p)
on earth
on faith
on fire(p)
on guard (current term)
on hand(p)
on her own(p)
on his own(p)
on it
on land
on leave
on occasion
on one's guard(p)
on one's own(p)
on one hand
on paper
on purpose
on request
on tap(p)

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