definition of the word tandem
â¢ TANDEM (noun) The noun TANDEM has 2 senses: 1. an arrangement of two or more objects or persons one behind another. 2. a bicycle with two sets of pedals and two seats. Familiarity information: TANDEM used as a noun is rare. â¢ TANDEM (adverb) The adverb TANDEM has 1 sense: 1. one behind the other. Familiarity information: TANDEM used as an adverb is very rare.