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Related to in tandem: thesaurus
[of two or more things] in single file. We marched to the door in tandem. They rode along in tandem.
in tandem (with somebody/something)
together The airlines cut prices in tandem. This director has worked in tandem with the same composer on several films.
if two things happen or are used in tandem, they happen or are used at the same time, and if two people do something in tandem, they do it together (often + with ) The new system is designed to be used in tandem with the existing communications network. She often works in tandem with a psychologist, one writing the software and the other advising on likely user reaction.