deliberately deviating from what is good; "there will always be a few people who, through macho perversity, gain satisfaction from bullying and terrorism"
having an indicated pole (as the distinction between positive and negative electric charges); "he got the polarity of the battery reversed"; "charges of opposite sign"
a focussed comparison; bringing together for a careful comparison
the act of hostile groups opposing each other; "the government was not ready for a confrontation with the unions"; "the invaders encountered stiff opposition"
a hostile disagreement face-to-face
discord resulting from a clash of ideas or opinions
a conflict of opposed ideas or attitudes or goals; "a collision of interests"
an accident resulting from violent impact of a moving object; "three passengers were killed in the collision"; "the collision of the two ships resulted in a serious oil spill"
(physics) an brief event in which two or more bodies come together; "the collision of the particles resulted in an exchange of energy and a change of direction"
the act of distinguishing by comparing differences
the range of optical density and tone on a photographic negative or print (or the extent to which adjacent areas on a television screen differ in brightness)
the perceptual effect of the juxtaposition of very different colors
the opposition or dissimilarity of things that are compared; "in contrast to", "by contrast"
put in opposition to show or emphasize differences; "The middle school teacher contrasted her best student's work with that of her weakest student"
to show differences when compared; be different; "the students contrast considerably in their artistic abilities"