lose by(redirected from lost by)
To fail to succeed (at some competitive activity) by a certain margin. A noun or pronoun can be used between "lose" and "by." I can't believe we lost by just two points—a single field goal and we would have won! He lost the student election by roughly 50 votes.
lose by something
to be defeated by a certain amount. Our team lost by ten points. I only lost by a few points.