n.
- a bicycle with seats and pedals for two riders, one behind the other.
- a carriage driven by two animals harnessed one in front of the other.
- a group of two people or machines working together.
adv.
one behind another.
Phrase
- in tandem
- alongside each other; together.
- one behind another.
Etymology
C18: humorously from L., lit. ‘at length’.