adverb
1. : in a tandem arrangement
tugging two supply-laden sleds in tandem — Time
2. : in partnership
the majority party will be functioning in tandem with the minority party — Elmo Roper
adverb
1. : in a tandem arrangement
tugging two supply-laden sleds in tandem — Time
2. : in partnership
the majority party will be functioning in tandem with the minority party — Elmo Roper
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012