1. bicycles built for two riders, one behind the other
2. arrangements of two people or things working together in partnership

Examples

• The park rents tandems for couples who want to ride together.
• They rode their tandem along the beach path every morning.
• The comedy show featured several tandems performing together.
• The research project involved tandems of scientists from different universities.
• Many tandems participated in the charity bike ride.
• The dance competition allowed tandems to compete as pairs.
• Several tandems were available for rent at the bike shop.