A tool made of two parts that are joined at a pivot and used for gripping and pulling things. The mechanic used a pincer to remove the nail from the tire.
A claw of a crustacean or other arthropod, used for grasping or holding. The crab used its pincer to defend itself from predators.
A military or tactical maneuver in which forces converge on an enemy from two or more directions. The generals planned a pincer to encircle the opposing army.