An Encylopedia Britannica Company

running mate

1 ENTRIES FOUND:
running mate noun
plural running mates
running mate
noun
plural running mates
Britannica Dictionary definition of RUNNING MATE
[count] chiefly US
: the person who runs with someone in an election (such as an election to choose a new president) and who is given the less important position (such as vice president) if they are elected