This mainly North American meaning refers to the hard central stones of fruits such as peaches, cherries, and plums.
Remove the cherry pits before cooking.
The peaches had unusually large pits.
In motor racing, the pits are the areas where vehicles stop for fuel, repairs, tires, and adjustments.
The driver returned to the pits for new tires.
Mechanics waited in the pits.
This is the third-person singular form of pit and means placing opponents in competition or conflict.
The contest pits experienced players against beginners.
The debate pits two competing theories against each other.