Definition of guard against
- Clean the wound to guard against infection.
- That's the sort of thinking we have to guard against.
: one assigned to protect or oversee another: such as
: a person or a body of persons on sentinel duty
: troops attached to the person of the sovereign
: to protect an edge of with an ornamental border
: to protect from danger especially by watchful attention : make secure
: to stand at the entrance of as if on guard or as a barrier
: in opposition or hostility to
: contrary to
: in competition with
: in preparation for the time when
What made you want to look up guard against? Please tell us where you read or heard it (including the quote, if possible).