noun Date: 1727 companion , a horse entered in a race to set the pace for a horse of the same owner or stable, a candidate running for a subordinate place on a ticket
RUNNING MATE
Meaning of RUNNING MATE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012