<p><strong>Noun</strong></p><ul><li>the state or relation of being different; dissimilarity: There is a great difference between the two.</li><li>an instance or point of unlikeness or dissimilarity: What accounts for the differences in their behavior?</li><li>a significant change in or effect on a situation: His tact makes a difference in the way people accept his suggestions.</li><li>a distinguishing characteristic; distinctive quality, feature, etc.: The difference in the two products is quality.</li><li>the degree to which one person or thing differs from another.</li><li>the act of distinguishing; discrimination; distinction.</li><li>a disagreement in opinion.</li><li>a dispute or quarrel.</li><li>Mathematics: the amount by which one quantity is greater or less than another.</li></ul><p><strong>Verb</strong></p><ul><li>to cause or constitute a difference in or between; make different.</li><li>to perceive the difference in or between; discriminate.</li></ul>