The organist tuned the contra-octave pipes before the concert to ensure the lowest notes would resonate clearly.

Every summer, the town musician contra dances at the village green.

We contra dance with friends at the community hall every Saturday night.

Every Saturday night, we go to the village hall to join the contra dance and laugh with friends.

We went to several contra dances last summer and made friends with dancers from other towns.

The apothecary kept a small vial of semen contra, a bitter aromatic drug made from the leaves and unexpanded flowers of Artemisia and imported from Aleppo and Barbary, on the highest shelf.

She spent the whole evening contra dancing with a grin on her face.

After the fiddler struck up a lively tune, we contra danced until midnight under the lanterns.

The undercover agent posed as a contra-trader to gather evidence against the network orchestrating the tax fraud.

The conference panel debated whether contra-traders were destabilizing the market with their aggressive short positions.