make a difference

Be important, matter, as in Her volunteer work made a difference in many lives . The antonym of this usage is make no difference , as in It makes no difference to me if we go immediately or in an hour . This usage appeared long ago in slightly different versions. Miles Coverdale's translation of the Bible of 1535 had it is no difference , and the converse, it makes great difference , was first recorded about 1470.

Also, make the difference . Cause a change in effect, change the nature of something, as in His score on this test will make the difference between passing and failing , or These curtains sure make a difference in the lighting .

Distinguish or discriminate. This phrase appears in the Bible (Leviticus 11:47): “To make a difference between the unclean and the clean.” [Late 1500s]