During the debate, the leader of the opposition challenged the prime minister's economic plan.

In yesterday's match, the opposition parries disrupted our rhythm and forced several turnovers.

During the summit, several political oppositions formed alliances to challenge the ruling coalition.

During the debate, the leaders of the opposition challenged the government's economic plan with a series of detailed questions.

After repeated incidents at school, his pediatrician diagnosed him with oppositional defiant disorder and recommended behavioral therapy.

The clinic reported an increase in oppositional defiant disorders among adolescents this year.

On Opposite Day, my little brother insisted that 'no' meant 'yes' and I had to say the opposite of what I meant.

When two lines intersect, an opposite angle has the same measure as the angle directly across from it, so knowing one lets you determine the other.

When two lines intersect, the opposite angles are equal, which helps solve many geometry problems.

As the old proverb goes, opposites attract, which is why my reserved sister ended up marrying a bold, outgoing musician.