Definition of before one knows it
- We'll be there before you know it.
- The game was over before I knew it.
: in advance : ahead
: at an earlier time
: forward of : in front of
: in the presence of
: under the jurisdiction or consideration of
: earlier than the time that
: sooner or quicker than
: so that … do not
: to perceive directly : have direct cognition of
: to have understanding of
: to recognize the nature of : discern
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